diff --git a/pkg/pb/bbgo.pb.go b/pkg/pb/bbgo.pb.go
index 2e8ae9e26..1c5d10584 100644
--- a/pkg/pb/bbgo.pb.go
+++ b/pkg/pb/bbgo.pb.go
@@ -1,8 +1,8 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.27.1
-// 	protoc        v3.19.4
-// source: bbgo.proto
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.19.3
+// source: pkg/pb/bbgo.proto
 
 package pb
 
@@ -20,6 +20,241 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+type Event int32
+
+const (
+	Event_UNKNOWN          Event = 0
+	Event_SUBSCRIBED       Event = 1
+	Event_UNSUBSCRIBED     Event = 2
+	Event_SNAPSHOT         Event = 3
+	Event_UPDATE           Event = 4
+	Event_AUTHENTICATED    Event = 5
+	Event_ORDER_SNAPSHOT   Event = 6
+	Event_ORDER_UPDATE     Event = 7
+	Event_TRADE_SNAPSHOT   Event = 8
+	Event_TRADE_UPDATE     Event = 9
+	Event_ACCOUNT_SNAPSHOT Event = 10
+	Event_ACCOUNT_UPDATE   Event = 11
+	Event_ERROR            Event = 99
+)
+
+// Enum value maps for Event.
+var (
+	Event_name = map[int32]string{
+		0:  "UNKNOWN",
+		1:  "SUBSCRIBED",
+		2:  "UNSUBSCRIBED",
+		3:  "SNAPSHOT",
+		4:  "UPDATE",
+		5:  "AUTHENTICATED",
+		6:  "ORDER_SNAPSHOT",
+		7:  "ORDER_UPDATE",
+		8:  "TRADE_SNAPSHOT",
+		9:  "TRADE_UPDATE",
+		10: "ACCOUNT_SNAPSHOT",
+		11: "ACCOUNT_UPDATE",
+		99: "ERROR",
+	}
+	Event_value = map[string]int32{
+		"UNKNOWN":          0,
+		"SUBSCRIBED":       1,
+		"UNSUBSCRIBED":     2,
+		"SNAPSHOT":         3,
+		"UPDATE":           4,
+		"AUTHENTICATED":    5,
+		"ORDER_SNAPSHOT":   6,
+		"ORDER_UPDATE":     7,
+		"TRADE_SNAPSHOT":   8,
+		"TRADE_UPDATE":     9,
+		"ACCOUNT_SNAPSHOT": 10,
+		"ACCOUNT_UPDATE":   11,
+		"ERROR":            99,
+	}
+)
+
+func (x Event) Enum() *Event {
+	p := new(Event)
+	*p = x
+	return p
+}
+
+func (x Event) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Event) Descriptor() protoreflect.EnumDescriptor {
+	return file_pkg_pb_bbgo_proto_enumTypes[0].Descriptor()
+}
+
+func (Event) Type() protoreflect.EnumType {
+	return &file_pkg_pb_bbgo_proto_enumTypes[0]
+}
+
+func (x Event) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Event.Descriptor instead.
+func (Event) EnumDescriptor() ([]byte, []int) {
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{0}
+}
+
+type Channel int32
+
+const (
+	Channel_BOOK   Channel = 0
+	Channel_TRADE  Channel = 1
+	Channel_TICKER Channel = 2
+	Channel_USER   Channel = 3
+)
+
+// Enum value maps for Channel.
+var (
+	Channel_name = map[int32]string{
+		0: "BOOK",
+		1: "TRADE",
+		2: "TICKER",
+		3: "USER",
+	}
+	Channel_value = map[string]int32{
+		"BOOK":   0,
+		"TRADE":  1,
+		"TICKER": 2,
+		"USER":   3,
+	}
+)
+
+func (x Channel) Enum() *Channel {
+	p := new(Channel)
+	*p = x
+	return p
+}
+
+func (x Channel) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Channel) Descriptor() protoreflect.EnumDescriptor {
+	return file_pkg_pb_bbgo_proto_enumTypes[1].Descriptor()
+}
+
+func (Channel) Type() protoreflect.EnumType {
+	return &file_pkg_pb_bbgo_proto_enumTypes[1]
+}
+
+func (x Channel) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Channel.Descriptor instead.
+func (Channel) EnumDescriptor() ([]byte, []int) {
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{1}
+}
+
+type Side int32
+
+const (
+	Side_BUY  Side = 0
+	Side_SELL Side = 1
+)
+
+// Enum value maps for Side.
+var (
+	Side_name = map[int32]string{
+		0: "BUY",
+		1: "SELL",
+	}
+	Side_value = map[string]int32{
+		"BUY":  0,
+		"SELL": 1,
+	}
+)
+
+func (x Side) Enum() *Side {
+	p := new(Side)
+	*p = x
+	return p
+}
+
+func (x Side) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Side) Descriptor() protoreflect.EnumDescriptor {
+	return file_pkg_pb_bbgo_proto_enumTypes[2].Descriptor()
+}
+
+func (Side) Type() protoreflect.EnumType {
+	return &file_pkg_pb_bbgo_proto_enumTypes[2]
+}
+
+func (x Side) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Side.Descriptor instead.
+func (Side) EnumDescriptor() ([]byte, []int) {
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{2}
+}
+
+type OrderType int32
+
+const (
+	OrderType_MARKET      OrderType = 0
+	OrderType_LIMIT       OrderType = 1
+	OrderType_STOP_MARKET OrderType = 2
+	OrderType_STOP_LIMIT  OrderType = 3
+	OrderType_POST_ONLY   OrderType = 4
+	OrderType_IOC_LIMIT   OrderType = 5
+)
+
+// Enum value maps for OrderType.
+var (
+	OrderType_name = map[int32]string{
+		0: "MARKET",
+		1: "LIMIT",
+		2: "STOP_MARKET",
+		3: "STOP_LIMIT",
+		4: "POST_ONLY",
+		5: "IOC_LIMIT",
+	}
+	OrderType_value = map[string]int32{
+		"MARKET":      0,
+		"LIMIT":       1,
+		"STOP_MARKET": 2,
+		"STOP_LIMIT":  3,
+		"POST_ONLY":   4,
+		"IOC_LIMIT":   5,
+	}
+)
+
+func (x OrderType) Enum() *OrderType {
+	p := new(OrderType)
+	*p = x
+	return p
+}
+
+func (x OrderType) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (OrderType) Descriptor() protoreflect.EnumDescriptor {
+	return file_pkg_pb_bbgo_proto_enumTypes[3].Descriptor()
+}
+
+func (OrderType) Type() protoreflect.EnumType {
+	return &file_pkg_pb_bbgo_proto_enumTypes[3]
+}
+
+func (x OrderType) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use OrderType.Descriptor instead.
+func (OrderType) EnumDescriptor() ([]byte, []int) {
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{3}
+}
+
 type Empty struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -29,7 +264,7 @@ type Empty struct {
 func (x *Empty) Reset() {
 	*x = Empty{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[0]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[0]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -42,7 +277,7 @@ func (x *Empty) String() string {
 func (*Empty) ProtoMessage() {}
 
 func (x *Empty) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[0]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[0]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -55,7 +290,7 @@ func (x *Empty) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Empty.ProtoReflect.Descriptor instead.
 func (*Empty) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{0}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{0}
 }
 
 type Error struct {
@@ -70,7 +305,7 @@ type Error struct {
 func (x *Error) Reset() {
 	*x = Error{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[1]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[1]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -83,7 +318,7 @@ func (x *Error) String() string {
 func (*Error) ProtoMessage() {}
 
 func (x *Error) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[1]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[1]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -96,7 +331,7 @@ func (x *Error) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Error.ProtoReflect.Descriptor instead.
 func (*Error) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{1}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{1}
 }
 
 func (x *Error) GetErrorCode() int64 {
@@ -124,7 +359,7 @@ type SubscribeRequest struct {
 func (x *SubscribeRequest) Reset() {
 	*x = SubscribeRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[2]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[2]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -137,7 +372,7 @@ func (x *SubscribeRequest) String() string {
 func (*SubscribeRequest) ProtoMessage() {}
 
 func (x *SubscribeRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[2]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[2]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -150,7 +385,7 @@ func (x *SubscribeRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubscribeRequest.ProtoReflect.Descriptor instead.
 func (*SubscribeRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{2}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *SubscribeRequest) GetSubscriptions() []*Subscription {
@@ -165,16 +400,16 @@ type Subscription struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Exchange string `protobuf:"bytes,1,opt,name=exchange,proto3" json:"exchange,omitempty"`
-	Channel  string `protobuf:"bytes,2,opt,name=channel,proto3" json:"channel,omitempty"` // book, trade, ticker
-	Symbol   string `protobuf:"bytes,3,opt,name=symbol,proto3" json:"symbol,omitempty"`
-	Depth    int64  `protobuf:"varint,4,opt,name=depth,proto3" json:"depth,omitempty"`
+	Exchange string  `protobuf:"bytes,1,opt,name=exchange,proto3" json:"exchange,omitempty"`
+	Channel  Channel `protobuf:"varint,2,opt,name=channel,proto3,enum=pb.Channel" json:"channel,omitempty"` // book, trade, ticker
+	Symbol   string  `protobuf:"bytes,3,opt,name=symbol,proto3" json:"symbol,omitempty"`
+	Depth    int64   `protobuf:"varint,4,opt,name=depth,proto3" json:"depth,omitempty"`
 }
 
 func (x *Subscription) Reset() {
 	*x = Subscription{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[3]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -187,7 +422,7 @@ func (x *Subscription) String() string {
 func (*Subscription) ProtoMessage() {}
 
 func (x *Subscription) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[3]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -200,7 +435,7 @@ func (x *Subscription) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Subscription.ProtoReflect.Descriptor instead.
 func (*Subscription) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{3}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *Subscription) GetExchange() string {
@@ -210,11 +445,11 @@ func (x *Subscription) GetExchange() string {
 	return ""
 }
 
-func (x *Subscription) GetChannel() string {
+func (x *Subscription) GetChannel() Channel {
 	if x != nil {
 		return x.Channel
 	}
-	return ""
+	return Channel_BOOK
 }
 
 func (x *Subscription) GetSymbol() string {
@@ -238,8 +473,8 @@ type SubscribeResponse struct {
 
 	Exchange     string     `protobuf:"bytes,1,opt,name=exchange,proto3" json:"exchange,omitempty"`
 	Symbol       string     `protobuf:"bytes,2,opt,name=symbol,proto3" json:"symbol,omitempty"`
-	Channel      string     `protobuf:"bytes,3,opt,name=channel,proto3" json:"channel,omitempty"` // book, trade, ticker, user
-	Event        string     `protobuf:"bytes,4,opt,name=event,proto3" json:"event,omitempty"`     // snapshot, update, order_snapshot, ...
+	Channel      Channel    `protobuf:"varint,3,opt,name=channel,proto3,enum=pb.Channel" json:"channel,omitempty"` // book, trade, ticker, user
+	Event        Event      `protobuf:"varint,4,opt,name=event,proto3,enum=pb.Event" json:"event,omitempty"`       // snapshot, update, order_snapshot, ...
 	Depth        *Depth     `protobuf:"bytes,5,opt,name=depth,proto3" json:"depth,omitempty"`
 	Trades       []*Trade   `protobuf:"bytes,6,rep,name=trades,proto3" json:"trades,omitempty"`
 	Ticker       *Ticker    `protobuf:"bytes,7,opt,name=ticker,proto3" json:"ticker,omitempty"`
@@ -252,7 +487,7 @@ type SubscribeResponse struct {
 func (x *SubscribeResponse) Reset() {
 	*x = SubscribeResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[4]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -265,7 +500,7 @@ func (x *SubscribeResponse) String() string {
 func (*SubscribeResponse) ProtoMessage() {}
 
 func (x *SubscribeResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[4]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -278,7 +513,7 @@ func (x *SubscribeResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubscribeResponse.ProtoReflect.Descriptor instead.
 func (*SubscribeResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{4}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *SubscribeResponse) GetExchange() string {
@@ -295,18 +530,18 @@ func (x *SubscribeResponse) GetSymbol() string {
 	return ""
 }
 
-func (x *SubscribeResponse) GetChannel() string {
+func (x *SubscribeResponse) GetChannel() Channel {
 	if x != nil {
 		return x.Channel
 	}
-	return ""
+	return Channel_BOOK
 }
 
-func (x *SubscribeResponse) GetEvent() string {
+func (x *SubscribeResponse) GetEvent() Event {
 	if x != nil {
 		return x.Event
 	}
-	return ""
+	return Event_UNKNOWN
 }
 
 func (x *SubscribeResponse) GetDepth() *Depth {
@@ -372,7 +607,7 @@ type Depth struct {
 func (x *Depth) Reset() {
 	*x = Depth{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[5]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -385,7 +620,7 @@ func (x *Depth) String() string {
 func (*Depth) ProtoMessage() {}
 
 func (x *Depth) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[5]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -398,7 +633,7 @@ func (x *Depth) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Depth.ProtoReflect.Descriptor instead.
 func (*Depth) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{5}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *Depth) GetExchange() string {
@@ -441,7 +676,7 @@ type PriceVolume struct {
 func (x *PriceVolume) Reset() {
 	*x = PriceVolume{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[6]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -454,7 +689,7 @@ func (x *PriceVolume) String() string {
 func (*PriceVolume) ProtoMessage() {}
 
 func (x *PriceVolume) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[6]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -467,7 +702,7 @@ func (x *PriceVolume) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PriceVolume.ProtoReflect.Descriptor instead.
 func (*PriceVolume) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{6}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *PriceVolume) GetPrice() int64 {
@@ -497,7 +732,7 @@ type Trade struct {
 	Price       float64 `protobuf:"fixed64,4,opt,name=price,proto3" json:"price,omitempty"`
 	Volume      float64 `protobuf:"fixed64,5,opt,name=volume,proto3" json:"volume,omitempty"`
 	CreatedAt   int64   `protobuf:"varint,6,opt,name=created_at,json=createdAt,proto3" json:"created_at,omitempty"`
-	Side        string  `protobuf:"bytes,7,opt,name=side,proto3" json:"side,omitempty"`
+	Side        Side    `protobuf:"varint,7,opt,name=side,proto3,enum=pb.Side" json:"side,omitempty"`
 	Fee         float64 `protobuf:"fixed64,8,opt,name=fee,proto3" json:"fee,omitempty"`
 	FeeCurrency string  `protobuf:"bytes,9,opt,name=fee_currency,json=feeCurrency,proto3" json:"fee_currency,omitempty"`
 	Maker       bool    `protobuf:"varint,10,opt,name=maker,proto3" json:"maker,omitempty"`
@@ -507,7 +742,7 @@ type Trade struct {
 func (x *Trade) Reset() {
 	*x = Trade{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[7]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -520,7 +755,7 @@ func (x *Trade) String() string {
 func (*Trade) ProtoMessage() {}
 
 func (x *Trade) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[7]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -533,7 +768,7 @@ func (x *Trade) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Trade.ProtoReflect.Descriptor instead.
 func (*Trade) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{7}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *Trade) GetExchange() string {
@@ -578,11 +813,11 @@ func (x *Trade) GetCreatedAt() int64 {
 	return 0
 }
 
-func (x *Trade) GetSide() string {
+func (x *Trade) GetSide() Side {
 	if x != nil {
 		return x.Side
 	}
-	return ""
+	return Side_BUY
 }
 
 func (x *Trade) GetFee() float64 {
@@ -631,7 +866,7 @@ type Ticker struct {
 func (x *Ticker) Reset() {
 	*x = Ticker{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[8]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -644,7 +879,7 @@ func (x *Ticker) String() string {
 func (*Ticker) ProtoMessage() {}
 
 func (x *Ticker) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[8]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -657,7 +892,7 @@ func (x *Ticker) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Ticker.ProtoReflect.Descriptor instead.
 func (*Ticker) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{8}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *Ticker) GetExchange() string {
@@ -715,27 +950,27 @@ type Order struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Exchange       string  `protobuf:"bytes,1,opt,name=exchange,proto3" json:"exchange,omitempty"`
-	Symbol         string  `protobuf:"bytes,2,opt,name=symbol,proto3" json:"symbol,omitempty"`
-	Id             string  `protobuf:"bytes,3,opt,name=id,proto3" json:"id,omitempty"`
-	Side           string  `protobuf:"bytes,4,opt,name=side,proto3" json:"side,omitempty"`
-	OrderType      string  `protobuf:"bytes,5,opt,name=order_type,json=orderType,proto3" json:"order_type,omitempty"`
-	Price          float64 `protobuf:"fixed64,6,opt,name=price,proto3" json:"price,omitempty"`
-	StopPrice      float64 `protobuf:"fixed64,7,opt,name=stop_price,json=stopPrice,proto3" json:"stop_price,omitempty"`
-	AvgPrice       float64 `protobuf:"fixed64,8,opt,name=avg_price,json=avgPrice,proto3" json:"avg_price,omitempty"`
-	Status         string  `protobuf:"bytes,9,opt,name=status,proto3" json:"status,omitempty"`
-	CreatedAt      int64   `protobuf:"varint,10,opt,name=created_at,json=createdAt,proto3" json:"created_at,omitempty"`
-	Quantity       float64 `protobuf:"fixed64,11,opt,name=quantity,proto3" json:"quantity,omitempty"`
-	ExecutedVolume float64 `protobuf:"fixed64,12,opt,name=executed_volume,json=executedVolume,proto3" json:"executed_volume,omitempty"`
-	TradesCount    int64   `protobuf:"varint,13,opt,name=trades_count,json=tradesCount,proto3" json:"trades_count,omitempty"`
-	ClientOrderId  string  `protobuf:"bytes,14,opt,name=client_order_id,json=clientOrderId,proto3" json:"client_order_id,omitempty"`
-	GroupId        int64   `protobuf:"varint,15,opt,name=group_id,json=groupId,proto3" json:"group_id,omitempty"`
+	Exchange       string    `protobuf:"bytes,1,opt,name=exchange,proto3" json:"exchange,omitempty"`
+	Symbol         string    `protobuf:"bytes,2,opt,name=symbol,proto3" json:"symbol,omitempty"`
+	Id             string    `protobuf:"bytes,3,opt,name=id,proto3" json:"id,omitempty"`
+	Side           Side      `protobuf:"varint,4,opt,name=side,proto3,enum=pb.Side" json:"side,omitempty"`
+	OrderType      OrderType `protobuf:"varint,5,opt,name=order_type,json=orderType,proto3,enum=pb.OrderType" json:"order_type,omitempty"`
+	Price          float64   `protobuf:"fixed64,6,opt,name=price,proto3" json:"price,omitempty"`
+	StopPrice      float64   `protobuf:"fixed64,7,opt,name=stop_price,json=stopPrice,proto3" json:"stop_price,omitempty"`
+	AvgPrice       float64   `protobuf:"fixed64,8,opt,name=avg_price,json=avgPrice,proto3" json:"avg_price,omitempty"`
+	Status         string    `protobuf:"bytes,9,opt,name=status,proto3" json:"status,omitempty"`
+	CreatedAt      int64     `protobuf:"varint,10,opt,name=created_at,json=createdAt,proto3" json:"created_at,omitempty"`
+	Quantity       float64   `protobuf:"fixed64,11,opt,name=quantity,proto3" json:"quantity,omitempty"`
+	ExecutedVolume float64   `protobuf:"fixed64,12,opt,name=executed_volume,json=executedVolume,proto3" json:"executed_volume,omitempty"`
+	TradesCount    int64     `protobuf:"varint,13,opt,name=trades_count,json=tradesCount,proto3" json:"trades_count,omitempty"`
+	ClientOrderId  string    `protobuf:"bytes,14,opt,name=client_order_id,json=clientOrderId,proto3" json:"client_order_id,omitempty"`
+	GroupId        int64     `protobuf:"varint,15,opt,name=group_id,json=groupId,proto3" json:"group_id,omitempty"`
 }
 
 func (x *Order) Reset() {
 	*x = Order{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[9]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -748,7 +983,7 @@ func (x *Order) String() string {
 func (*Order) ProtoMessage() {}
 
 func (x *Order) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[9]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -761,7 +996,7 @@ func (x *Order) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Order.ProtoReflect.Descriptor instead.
 func (*Order) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{9}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *Order) GetExchange() string {
@@ -785,18 +1020,18 @@ func (x *Order) GetId() string {
 	return ""
 }
 
-func (x *Order) GetSide() string {
+func (x *Order) GetSide() Side {
 	if x != nil {
 		return x.Side
 	}
-	return ""
+	return Side_BUY
 }
 
-func (x *Order) GetOrderType() string {
+func (x *Order) GetOrderType() OrderType {
 	if x != nil {
 		return x.OrderType
 	}
-	return ""
+	return OrderType_MARKET
 }
 
 func (x *Order) GetPrice() float64 {
@@ -874,21 +1109,21 @@ type SubmitOrder struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Exchange      string  `protobuf:"bytes,1,opt,name=exchange,proto3" json:"exchange,omitempty"`
-	Symbol        string  `protobuf:"bytes,2,opt,name=symbol,proto3" json:"symbol,omitempty"`
-	Side          string  `protobuf:"bytes,3,opt,name=side,proto3" json:"side,omitempty"`
-	Quantity      float64 `protobuf:"fixed64,4,opt,name=quantity,proto3" json:"quantity,omitempty"`
-	Price         float64 `protobuf:"fixed64,5,opt,name=price,proto3" json:"price,omitempty"`
-	StopPrice     float64 `protobuf:"fixed64,6,opt,name=stop_price,json=stopPrice,proto3" json:"stop_price,omitempty"`
-	OrderType     string  `protobuf:"bytes,7,opt,name=order_type,json=orderType,proto3" json:"order_type,omitempty"`
-	ClientOrderId string  `protobuf:"bytes,8,opt,name=client_order_id,json=clientOrderId,proto3" json:"client_order_id,omitempty"`
-	GroupId       int64   `protobuf:"varint,9,opt,name=group_id,json=groupId,proto3" json:"group_id,omitempty"`
+	Exchange      string    `protobuf:"bytes,1,opt,name=exchange,proto3" json:"exchange,omitempty"`
+	Symbol        string    `protobuf:"bytes,2,opt,name=symbol,proto3" json:"symbol,omitempty"`
+	Side          Side      `protobuf:"varint,3,opt,name=side,proto3,enum=pb.Side" json:"side,omitempty"`
+	Quantity      float64   `protobuf:"fixed64,4,opt,name=quantity,proto3" json:"quantity,omitempty"`
+	Price         float64   `protobuf:"fixed64,5,opt,name=price,proto3" json:"price,omitempty"`
+	StopPrice     float64   `protobuf:"fixed64,6,opt,name=stop_price,json=stopPrice,proto3" json:"stop_price,omitempty"`
+	OrderType     OrderType `protobuf:"varint,7,opt,name=order_type,json=orderType,proto3,enum=pb.OrderType" json:"order_type,omitempty"`
+	ClientOrderId string    `protobuf:"bytes,8,opt,name=client_order_id,json=clientOrderId,proto3" json:"client_order_id,omitempty"`
+	GroupId       int64     `protobuf:"varint,9,opt,name=group_id,json=groupId,proto3" json:"group_id,omitempty"`
 }
 
 func (x *SubmitOrder) Reset() {
 	*x = SubmitOrder{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[10]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -901,7 +1136,7 @@ func (x *SubmitOrder) String() string {
 func (*SubmitOrder) ProtoMessage() {}
 
 func (x *SubmitOrder) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[10]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -914,7 +1149,7 @@ func (x *SubmitOrder) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitOrder.ProtoReflect.Descriptor instead.
 func (*SubmitOrder) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{10}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *SubmitOrder) GetExchange() string {
@@ -931,11 +1166,11 @@ func (x *SubmitOrder) GetSymbol() string {
 	return ""
 }
 
-func (x *SubmitOrder) GetSide() string {
+func (x *SubmitOrder) GetSide() Side {
 	if x != nil {
 		return x.Side
 	}
-	return ""
+	return Side_BUY
 }
 
 func (x *SubmitOrder) GetQuantity() float64 {
@@ -959,11 +1194,11 @@ func (x *SubmitOrder) GetStopPrice() float64 {
 	return 0
 }
 
-func (x *SubmitOrder) GetOrderType() string {
+func (x *SubmitOrder) GetOrderType() OrderType {
 	if x != nil {
 		return x.OrderType
 	}
-	return ""
+	return OrderType_MARKET
 }
 
 func (x *SubmitOrder) GetClientOrderId() string {
@@ -995,7 +1230,7 @@ type Balance struct {
 func (x *Balance) Reset() {
 	*x = Balance{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[11]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1008,7 +1243,7 @@ func (x *Balance) String() string {
 func (*Balance) ProtoMessage() {}
 
 func (x *Balance) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[11]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1021,7 +1256,7 @@ func (x *Balance) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Balance.ProtoReflect.Descriptor instead.
 func (*Balance) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{11}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *Balance) GetExchange() string {
@@ -1063,7 +1298,7 @@ type SubmitOrderRequest struct {
 func (x *SubmitOrderRequest) Reset() {
 	*x = SubmitOrderRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[12]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1076,7 +1311,7 @@ func (x *SubmitOrderRequest) String() string {
 func (*SubmitOrderRequest) ProtoMessage() {}
 
 func (x *SubmitOrderRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[12]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1089,7 +1324,7 @@ func (x *SubmitOrderRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitOrderRequest.ProtoReflect.Descriptor instead.
 func (*SubmitOrderRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{12}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{12}
 }
 
 func (x *SubmitOrderRequest) GetSubmitOrder() *SubmitOrder {
@@ -1111,7 +1346,7 @@ type SubmitOrderResponse struct {
 func (x *SubmitOrderResponse) Reset() {
 	*x = SubmitOrderResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[13]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1124,7 +1359,7 @@ func (x *SubmitOrderResponse) String() string {
 func (*SubmitOrderResponse) ProtoMessage() {}
 
 func (x *SubmitOrderResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[13]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1137,7 +1372,7 @@ func (x *SubmitOrderResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitOrderResponse.ProtoReflect.Descriptor instead.
 func (*SubmitOrderResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{13}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{13}
 }
 
 func (x *SubmitOrderResponse) GetOrder() *Order {
@@ -1167,7 +1402,7 @@ type CancelOrderRequest struct {
 func (x *CancelOrderRequest) Reset() {
 	*x = CancelOrderRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[14]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[14]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1180,7 +1415,7 @@ func (x *CancelOrderRequest) String() string {
 func (*CancelOrderRequest) ProtoMessage() {}
 
 func (x *CancelOrderRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[14]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[14]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1193,7 +1428,7 @@ func (x *CancelOrderRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CancelOrderRequest.ProtoReflect.Descriptor instead.
 func (*CancelOrderRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{14}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{14}
 }
 
 func (x *CancelOrderRequest) GetExchange() string {
@@ -1229,7 +1464,7 @@ type CancelOrderResponse struct {
 func (x *CancelOrderResponse) Reset() {
 	*x = CancelOrderResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[15]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[15]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1242,7 +1477,7 @@ func (x *CancelOrderResponse) String() string {
 func (*CancelOrderResponse) ProtoMessage() {}
 
 func (x *CancelOrderResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[15]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[15]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1255,7 +1490,7 @@ func (x *CancelOrderResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CancelOrderResponse.ProtoReflect.Descriptor instead.
 func (*CancelOrderResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{15}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{15}
 }
 
 func (x *CancelOrderResponse) GetOrder() *Order {
@@ -1285,7 +1520,7 @@ type QueryOrderRequest struct {
 func (x *QueryOrderRequest) Reset() {
 	*x = QueryOrderRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[16]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[16]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1298,7 +1533,7 @@ func (x *QueryOrderRequest) String() string {
 func (*QueryOrderRequest) ProtoMessage() {}
 
 func (x *QueryOrderRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[16]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[16]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1311,7 +1546,7 @@ func (x *QueryOrderRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryOrderRequest.ProtoReflect.Descriptor instead.
 func (*QueryOrderRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{16}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{16}
 }
 
 func (x *QueryOrderRequest) GetExchange() string {
@@ -1347,7 +1582,7 @@ type QueryOrderResponse struct {
 func (x *QueryOrderResponse) Reset() {
 	*x = QueryOrderResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[17]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1360,7 +1595,7 @@ func (x *QueryOrderResponse) String() string {
 func (*QueryOrderResponse) ProtoMessage() {}
 
 func (x *QueryOrderResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[17]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1373,7 +1608,7 @@ func (x *QueryOrderResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryOrderResponse.ProtoReflect.Descriptor instead.
 func (*QueryOrderResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{17}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{17}
 }
 
 func (x *QueryOrderResponse) GetOrder() *Order {
@@ -1409,7 +1644,7 @@ type QueryOrdersRequest struct {
 func (x *QueryOrdersRequest) Reset() {
 	*x = QueryOrdersRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[18]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[18]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1422,7 +1657,7 @@ func (x *QueryOrdersRequest) String() string {
 func (*QueryOrdersRequest) ProtoMessage() {}
 
 func (x *QueryOrdersRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[18]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[18]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1435,7 +1670,7 @@ func (x *QueryOrdersRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryOrdersRequest.ProtoReflect.Descriptor instead.
 func (*QueryOrdersRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{18}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *QueryOrdersRequest) GetExchange() string {
@@ -1513,7 +1748,7 @@ type QueryOrdersResponse struct {
 func (x *QueryOrdersResponse) Reset() {
 	*x = QueryOrdersResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[19]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[19]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1526,7 +1761,7 @@ func (x *QueryOrdersResponse) String() string {
 func (*QueryOrdersResponse) ProtoMessage() {}
 
 func (x *QueryOrdersResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[19]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[19]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1539,7 +1774,7 @@ func (x *QueryOrdersResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryOrdersResponse.ProtoReflect.Descriptor instead.
 func (*QueryOrdersResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{19}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{19}
 }
 
 func (x *QueryOrdersResponse) GetOrders() []*Order {
@@ -1576,7 +1811,7 @@ type QueryTradesRequest struct {
 func (x *QueryTradesRequest) Reset() {
 	*x = QueryTradesRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[20]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[20]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1589,7 +1824,7 @@ func (x *QueryTradesRequest) String() string {
 func (*QueryTradesRequest) ProtoMessage() {}
 
 func (x *QueryTradesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[20]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[20]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1602,7 +1837,7 @@ func (x *QueryTradesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryTradesRequest.ProtoReflect.Descriptor instead.
 func (*QueryTradesRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{20}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{20}
 }
 
 func (x *QueryTradesRequest) GetExchange() string {
@@ -1687,7 +1922,7 @@ type QueryTradesResponse struct {
 func (x *QueryTradesResponse) Reset() {
 	*x = QueryTradesResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[21]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[21]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1700,7 +1935,7 @@ func (x *QueryTradesResponse) String() string {
 func (*QueryTradesResponse) ProtoMessage() {}
 
 func (x *QueryTradesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[21]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[21]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1713,7 +1948,7 @@ func (x *QueryTradesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryTradesResponse.ProtoReflect.Descriptor instead.
 func (*QueryTradesResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{21}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{21}
 }
 
 func (x *QueryTradesResponse) GetTrades() []*Trade {
@@ -1737,15 +1972,15 @@ type QueryKLinesRequest struct {
 
 	Exchange  string `protobuf:"bytes,1,opt,name=exchange,proto3" json:"exchange,omitempty"`
 	Symbol    string `protobuf:"bytes,2,opt,name=symbol,proto3" json:"symbol,omitempty"`
-	Limit     int64  `protobuf:"varint,3,opt,name=limit,proto3" json:"limit,omitempty"`
-	Interval  int64  `protobuf:"varint,4,opt,name=interval,proto3" json:"interval,omitempty"` // time period of K line in minute
-	Timestamp int64  `protobuf:"varint,5,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	Interval  string `protobuf:"bytes,3,opt,name=interval,proto3" json:"interval,omitempty"` // time period of K line in minute
+	Timestamp int64  `protobuf:"varint,4,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	Limit     int64  `protobuf:"varint,5,opt,name=limit,proto3" json:"limit,omitempty"`
 }
 
 func (x *QueryKLinesRequest) Reset() {
 	*x = QueryKLinesRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[22]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[22]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1758,7 +1993,7 @@ func (x *QueryKLinesRequest) String() string {
 func (*QueryKLinesRequest) ProtoMessage() {}
 
 func (x *QueryKLinesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[22]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[22]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1771,7 +2006,7 @@ func (x *QueryKLinesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryKLinesRequest.ProtoReflect.Descriptor instead.
 func (*QueryKLinesRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{22}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{22}
 }
 
 func (x *QueryKLinesRequest) GetExchange() string {
@@ -1788,18 +2023,11 @@ func (x *QueryKLinesRequest) GetSymbol() string {
 	return ""
 }
 
-func (x *QueryKLinesRequest) GetLimit() int64 {
-	if x != nil {
-		return x.Limit
-	}
-	return 0
-}
-
-func (x *QueryKLinesRequest) GetInterval() int64 {
+func (x *QueryKLinesRequest) GetInterval() string {
 	if x != nil {
 		return x.Interval
 	}
-	return 0
+	return ""
 }
 
 func (x *QueryKLinesRequest) GetTimestamp() int64 {
@@ -1809,6 +2037,13 @@ func (x *QueryKLinesRequest) GetTimestamp() int64 {
 	return 0
 }
 
+func (x *QueryKLinesRequest) GetLimit() int64 {
+	if x != nil {
+		return x.Limit
+	}
+	return 0
+}
+
 type QueryKLinesResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1821,7 +2056,7 @@ type QueryKLinesResponse struct {
 func (x *QueryKLinesResponse) Reset() {
 	*x = QueryKLinesResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[23]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[23]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1834,7 +2069,7 @@ func (x *QueryKLinesResponse) String() string {
 func (*QueryKLinesResponse) ProtoMessage() {}
 
 func (x *QueryKLinesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[23]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[23]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1847,7 +2082,7 @@ func (x *QueryKLinesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryKLinesResponse.ProtoReflect.Descriptor instead.
 func (*QueryKLinesResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{23}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{23}
 }
 
 func (x *QueryKLinesResponse) GetKlines() []*KLine {
@@ -1883,7 +2118,7 @@ type KLine struct {
 func (x *KLine) Reset() {
 	*x = KLine{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[24]
+		mi := &file_pkg_pb_bbgo_proto_msgTypes[24]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1896,7 +2131,7 @@ func (x *KLine) String() string {
 func (*KLine) ProtoMessage() {}
 
 func (x *KLine) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[24]
+	mi := &file_pkg_pb_bbgo_proto_msgTypes[24]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1909,7 +2144,7 @@ func (x *KLine) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KLine.ProtoReflect.Descriptor instead.
 func (*KLine) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{24}
+	return file_pkg_pb_bbgo_proto_rawDescGZIP(), []int{24}
 }
 
 func (x *KLine) GetExchange() string {
@@ -1975,379 +2210,427 @@ func (x *KLine) GetQuoteVolume() float64 {
 	return 0
 }
 
-var File_bbgo_proto protoreflect.FileDescriptor
+var File_pkg_pb_bbgo_proto protoreflect.FileDescriptor
 
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+	0x51, 0x75, 0x65, 0x72, 0x79, 0x54, 0x72, 0x61, 0x64, 0x65, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65,
+	0x73, 0x74, 0x1a, 0x17, 0x2e, 0x70, 0x62, 0x2e, 0x51, 0x75, 0x65, 0x72, 0x79, 0x54, 0x72, 0x61,
+	0x64, 0x65, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x42, 0x07, 0x5a,
+	0x05, 0x2e, 0x2e, 0x2f, 0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
-	file_bbgo_proto_rawDescOnce sync.Once
-	file_bbgo_proto_rawDescData = file_bbgo_proto_rawDesc
+	file_pkg_pb_bbgo_proto_rawDescOnce sync.Once
+	file_pkg_pb_bbgo_proto_rawDescData = file_pkg_pb_bbgo_proto_rawDesc
 )
 
-func file_bbgo_proto_rawDescGZIP() []byte {
-	file_bbgo_proto_rawDescOnce.Do(func() {
-		file_bbgo_proto_rawDescData = protoimpl.X.CompressGZIP(file_bbgo_proto_rawDescData)
+func file_pkg_pb_bbgo_proto_rawDescGZIP() []byte {
+	file_pkg_pb_bbgo_proto_rawDescOnce.Do(func() {
+		file_pkg_pb_bbgo_proto_rawDescData = protoimpl.X.CompressGZIP(file_pkg_pb_bbgo_proto_rawDescData)
 	})
-	return file_bbgo_proto_rawDescData
+	return file_pkg_pb_bbgo_proto_rawDescData
 }
 
-var file_bbgo_proto_msgTypes = make([]protoimpl.MessageInfo, 25)
-var file_bbgo_proto_goTypes = []interface{}{
-	(*Empty)(nil),               // 0: pb.Empty
-	(*Error)(nil),               // 1: pb.Error
-	(*SubscribeRequest)(nil),    // 2: pb.SubscribeRequest
-	(*Subscription)(nil),        // 3: pb.Subscription
-	(*SubscribeResponse)(nil),   // 4: pb.SubscribeResponse
-	(*Depth)(nil),               // 5: pb.Depth
-	(*PriceVolume)(nil),         // 6: pb.PriceVolume
-	(*Trade)(nil),               // 7: pb.Trade
-	(*Ticker)(nil),              // 8: pb.Ticker
-	(*Order)(nil),               // 9: pb.Order
-	(*SubmitOrder)(nil),         // 10: pb.SubmitOrder
-	(*Balance)(nil),             // 11: pb.Balance
-	(*SubmitOrderRequest)(nil),  // 12: pb.SubmitOrderRequest
-	(*SubmitOrderResponse)(nil), // 13: pb.SubmitOrderResponse
-	(*CancelOrderRequest)(nil),  // 14: pb.CancelOrderRequest
-	(*CancelOrderResponse)(nil), // 15: pb.CancelOrderResponse
-	(*QueryOrderRequest)(nil),   // 16: pb.QueryOrderRequest
-	(*QueryOrderResponse)(nil),  // 17: pb.QueryOrderResponse
-	(*QueryOrdersRequest)(nil),  // 18: pb.QueryOrdersRequest
-	(*QueryOrdersResponse)(nil), // 19: pb.QueryOrdersResponse
-	(*QueryTradesRequest)(nil),  // 20: pb.QueryTradesRequest
-	(*QueryTradesResponse)(nil), // 21: pb.QueryTradesResponse
-	(*QueryKLinesRequest)(nil),  // 22: pb.QueryKLinesRequest
-	(*QueryKLinesResponse)(nil), // 23: pb.QueryKLinesResponse
-	(*KLine)(nil),               // 24: pb.KLine
+var file_pkg_pb_bbgo_proto_enumTypes = make([]protoimpl.EnumInfo, 4)
+var file_pkg_pb_bbgo_proto_msgTypes = make([]protoimpl.MessageInfo, 25)
+var file_pkg_pb_bbgo_proto_goTypes = []interface{}{
+	(Event)(0),                  // 0: pb.Event
+	(Channel)(0),                // 1: pb.Channel
+	(Side)(0),                   // 2: pb.Side
+	(OrderType)(0),              // 3: pb.OrderType
+	(*Empty)(nil),               // 4: pb.Empty
+	(*Error)(nil),               // 5: pb.Error
+	(*SubscribeRequest)(nil),    // 6: pb.SubscribeRequest
+	(*Subscription)(nil),        // 7: pb.Subscription
+	(*SubscribeResponse)(nil),   // 8: pb.SubscribeResponse
+	(*Depth)(nil),               // 9: pb.Depth
+	(*PriceVolume)(nil),         // 10: pb.PriceVolume
+	(*Trade)(nil),               // 11: pb.Trade
+	(*Ticker)(nil),              // 12: pb.Ticker
+	(*Order)(nil),               // 13: pb.Order
+	(*SubmitOrder)(nil),         // 14: pb.SubmitOrder
+	(*Balance)(nil),             // 15: pb.Balance
+	(*SubmitOrderRequest)(nil),  // 16: pb.SubmitOrderRequest
+	(*SubmitOrderResponse)(nil), // 17: pb.SubmitOrderResponse
+	(*CancelOrderRequest)(nil),  // 18: pb.CancelOrderRequest
+	(*CancelOrderResponse)(nil), // 19: pb.CancelOrderResponse
+	(*QueryOrderRequest)(nil),   // 20: pb.QueryOrderRequest
+	(*QueryOrderResponse)(nil),  // 21: pb.QueryOrderResponse
+	(*QueryOrdersRequest)(nil),  // 22: pb.QueryOrdersRequest
+	(*QueryOrdersResponse)(nil), // 23: pb.QueryOrdersResponse
+	(*QueryTradesRequest)(nil),  // 24: pb.QueryTradesRequest
+	(*QueryTradesResponse)(nil), // 25: pb.QueryTradesResponse
+	(*QueryKLinesRequest)(nil),  // 26: pb.QueryKLinesRequest
+	(*QueryKLinesResponse)(nil), // 27: pb.QueryKLinesResponse
+	(*KLine)(nil),               // 28: pb.KLine
 }
-var file_bbgo_proto_depIdxs = []int32{
-	3,  // 0: pb.SubscribeRequest.subscriptions:type_name -> pb.Subscription
-	5,  // 1: pb.SubscribeResponse.depth:type_name -> pb.Depth
-	7,  // 2: pb.SubscribeResponse.trades:type_name -> pb.Trade
-	8,  // 3: pb.SubscribeResponse.ticker:type_name -> pb.Ticker
-	9,  // 4: pb.SubscribeResponse.orders:type_name -> pb.Order
-	11, // 5: pb.SubscribeResponse.balances:type_name -> pb.Balance
-	1,  // 6: pb.SubscribeResponse.error:type_name -> pb.Error
-	6,  // 7: pb.Depth.asks:type_name -> pb.PriceVolume
-	6,  // 8: pb.Depth.bids:type_name -> pb.PriceVolume
-	10, // 9: pb.SubmitOrderRequest.submit_order:type_name -> pb.SubmitOrder
-	9,  // 10: pb.SubmitOrderResponse.order:type_name -> pb.Order
-	1,  // 11: pb.SubmitOrderResponse.error:type_name -> pb.Error
-	9,  // 12: pb.CancelOrderResponse.order:type_name -> pb.Order
-	1,  // 13: pb.CancelOrderResponse.error:type_name -> pb.Error
-	9,  // 14: pb.QueryOrderResponse.order:type_name -> pb.Order
-	1,  // 15: pb.QueryOrderResponse.error:type_name -> pb.Error
-	9,  // 16: pb.QueryOrdersResponse.orders:type_name -> pb.Order
-	1,  // 17: pb.QueryOrdersResponse.error:type_name -> pb.Error
-	7,  // 18: pb.QueryTradesResponse.trades:type_name -> pb.Trade
-	1,  // 19: pb.QueryTradesResponse.error:type_name -> pb.Error
-	24, // 20: pb.QueryKLinesResponse.klines:type_name -> pb.KLine
-	1,  // 21: pb.QueryKLinesResponse.error:type_name -> pb.Error
-	2,  // 22: pb.BBGO.Subcribe:input_type -> pb.SubscribeRequest
-	0,  // 23: pb.BBGO.SubcribeUserData:input_type -> pb.Empty
-	12, // 24: pb.BBGO.SubmitOrder:input_type -> pb.SubmitOrderRequest
-	14, // 25: pb.BBGO.CancelOrder:input_type -> pb.CancelOrderRequest
-	16, // 26: pb.BBGO.QueryOrder:input_type -> pb.QueryOrderRequest
-	18, // 27: pb.BBGO.QueryOrders:input_type -> pb.QueryOrdersRequest
-	20, // 28: pb.BBGO.QueryTrades:input_type -> pb.QueryTradesRequest
-	22, // 29: pb.BBGO.QueryKLines:input_type -> pb.QueryKLinesRequest
-	4,  // 30: pb.BBGO.Subcribe:output_type -> pb.SubscribeResponse
-	4,  // 31: pb.BBGO.SubcribeUserData:output_type -> pb.SubscribeResponse
-	13, // 32: pb.BBGO.SubmitOrder:output_type -> pb.SubmitOrderResponse
-	15, // 33: pb.BBGO.CancelOrder:output_type -> pb.CancelOrderResponse
-	17, // 34: pb.BBGO.QueryOrder:output_type -> pb.QueryOrderResponse
-	19, // 35: pb.BBGO.QueryOrders:output_type -> pb.QueryOrdersResponse
-	21, // 36: pb.BBGO.QueryTrades:output_type -> pb.QueryTradesResponse
-	23, // 37: pb.BBGO.QueryKLines:output_type -> pb.QueryKLinesResponse
-	30, // [30:38] is the sub-list for method output_type
-	22, // [22:30] is the sub-list for method input_type
-	22, // [22:22] is the sub-list for extension type_name
-	22, // [22:22] is the sub-list for extension extendee
-	0,  // [0:22] is the sub-list for field type_name
+var file_pkg_pb_bbgo_proto_depIdxs = []int32{
+	7,  // 0: pb.SubscribeRequest.subscriptions:type_name -> pb.Subscription
+	1,  // 1: pb.Subscription.channel:type_name -> pb.Channel
+	1,  // 2: pb.SubscribeResponse.channel:type_name -> pb.Channel
+	0,  // 3: pb.SubscribeResponse.event:type_name -> pb.Event
+	9,  // 4: pb.SubscribeResponse.depth:type_name -> pb.Depth
+	11, // 5: pb.SubscribeResponse.trades:type_name -> pb.Trade
+	12, // 6: pb.SubscribeResponse.ticker:type_name -> pb.Ticker
+	13, // 7: pb.SubscribeResponse.orders:type_name -> pb.Order
+	15, // 8: pb.SubscribeResponse.balances:type_name -> pb.Balance
+	5,  // 9: pb.SubscribeResponse.error:type_name -> pb.Error
+	10, // 10: pb.Depth.asks:type_name -> pb.PriceVolume
+	10, // 11: pb.Depth.bids:type_name -> pb.PriceVolume
+	2,  // 12: pb.Trade.side:type_name -> pb.Side
+	2,  // 13: pb.Order.side:type_name -> pb.Side
+	3,  // 14: pb.Order.order_type:type_name -> pb.OrderType
+	2,  // 15: pb.SubmitOrder.side:type_name -> pb.Side
+	3,  // 16: pb.SubmitOrder.order_type:type_name -> pb.OrderType
+	14, // 17: pb.SubmitOrderRequest.submit_order:type_name -> pb.SubmitOrder
+	13, // 18: pb.SubmitOrderResponse.order:type_name -> pb.Order
+	5,  // 19: pb.SubmitOrderResponse.error:type_name -> pb.Error
+	13, // 20: pb.CancelOrderResponse.order:type_name -> pb.Order
+	5,  // 21: pb.CancelOrderResponse.error:type_name -> pb.Error
+	13, // 22: pb.QueryOrderResponse.order:type_name -> pb.Order
+	5,  // 23: pb.QueryOrderResponse.error:type_name -> pb.Error
+	13, // 24: pb.QueryOrdersResponse.orders:type_name -> pb.Order
+	5,  // 25: pb.QueryOrdersResponse.error:type_name -> pb.Error
+	11, // 26: pb.QueryTradesResponse.trades:type_name -> pb.Trade
+	5,  // 27: pb.QueryTradesResponse.error:type_name -> pb.Error
+	28, // 28: pb.QueryKLinesResponse.klines:type_name -> pb.KLine
+	5,  // 29: pb.QueryKLinesResponse.error:type_name -> pb.Error
+	6,  // 30: pb.MarketDataService.Subscribe:input_type -> pb.SubscribeRequest
+	26, // 31: pb.MarketDataService.QueryKLines:input_type -> pb.QueryKLinesRequest
+	4,  // 32: pb.UserDataService.SubscribeUserData:input_type -> pb.Empty
+	16, // 33: pb.TradingService.SubmitOrder:input_type -> pb.SubmitOrderRequest
+	18, // 34: pb.TradingService.CancelOrder:input_type -> pb.CancelOrderRequest
+	20, // 35: pb.TradingService.QueryOrder:input_type -> pb.QueryOrderRequest
+	22, // 36: pb.TradingService.QueryOrders:input_type -> pb.QueryOrdersRequest
+	24, // 37: pb.TradingService.QueryTrades:input_type -> pb.QueryTradesRequest
+	8,  // 38: pb.MarketDataService.Subscribe:output_type -> pb.SubscribeResponse
+	27, // 39: pb.MarketDataService.QueryKLines:output_type -> pb.QueryKLinesResponse
+	8,  // 40: pb.UserDataService.SubscribeUserData:output_type -> pb.SubscribeResponse
+	17, // 41: pb.TradingService.SubmitOrder:output_type -> pb.SubmitOrderResponse
+	19, // 42: pb.TradingService.CancelOrder:output_type -> pb.CancelOrderResponse
+	21, // 43: pb.TradingService.QueryOrder:output_type -> pb.QueryOrderResponse
+	23, // 44: pb.TradingService.QueryOrders:output_type -> pb.QueryOrdersResponse
+	25, // 45: pb.TradingService.QueryTrades:output_type -> pb.QueryTradesResponse
+	38, // [38:46] is the sub-list for method output_type
+	30, // [30:38] is the sub-list for method input_type
+	30, // [30:30] is the sub-list for extension type_name
+	30, // [30:30] is the sub-list for extension extendee
+	0,  // [0:30] is the sub-list for field type_name
 }
 
-func init() { file_bbgo_proto_init() }
-func file_bbgo_proto_init() {
-	if File_bbgo_proto != nil {
+func init() { file_pkg_pb_bbgo_proto_init() }
+func file_pkg_pb_bbgo_proto_init() {
+	if File_pkg_pb_bbgo_proto != nil {
 		return
 	}
 	if !protoimpl.UnsafeEnabled {
-		file_bbgo_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Empty); i {
 			case 0:
 				return &v.state
@@ -2359,7 +2642,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Error); i {
 			case 0:
 				return &v.state
@@ -2371,7 +2654,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SubscribeRequest); i {
 			case 0:
 				return &v.state
@@ -2383,7 +2666,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Subscription); i {
 			case 0:
 				return &v.state
@@ -2395,7 +2678,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SubscribeResponse); i {
 			case 0:
 				return &v.state
@@ -2407,7 +2690,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Depth); i {
 			case 0:
 				return &v.state
@@ -2419,7 +2702,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*PriceVolume); i {
 			case 0:
 				return &v.state
@@ -2431,7 +2714,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Trade); i {
 			case 0:
 				return &v.state
@@ -2443,7 +2726,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Ticker); i {
 			case 0:
 				return &v.state
@@ -2455,7 +2738,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Order); i {
 			case 0:
 				return &v.state
@@ -2467,7 +2750,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SubmitOrder); i {
 			case 0:
 				return &v.state
@@ -2479,7 +2762,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Balance); i {
 			case 0:
 				return &v.state
@@ -2491,7 +2774,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SubmitOrderRequest); i {
 			case 0:
 				return &v.state
@@ -2503,7 +2786,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SubmitOrderResponse); i {
 			case 0:
 				return &v.state
@@ -2515,7 +2798,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*CancelOrderRequest); i {
 			case 0:
 				return &v.state
@@ -2527,7 +2810,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*CancelOrderResponse); i {
 			case 0:
 				return &v.state
@@ -2539,7 +2822,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryOrderRequest); i {
 			case 0:
 				return &v.state
@@ -2551,7 +2834,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryOrderResponse); i {
 			case 0:
 				return &v.state
@@ -2563,7 +2846,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryOrdersRequest); i {
 			case 0:
 				return &v.state
@@ -2575,7 +2858,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[19].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[19].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryOrdersResponse); i {
 			case 0:
 				return &v.state
@@ -2587,7 +2870,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[20].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[20].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryTradesRequest); i {
 			case 0:
 				return &v.state
@@ -2599,7 +2882,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[21].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[21].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryTradesResponse); i {
 			case 0:
 				return &v.state
@@ -2611,7 +2894,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[22].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[22].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryKLinesRequest); i {
 			case 0:
 				return &v.state
@@ -2623,7 +2906,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[23].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[23].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryKLinesResponse); i {
 			case 0:
 				return &v.state
@@ -2635,7 +2918,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[24].Exporter = func(v interface{}, i int) interface{} {
+		file_pkg_pb_bbgo_proto_msgTypes[24].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*KLine); i {
 			case 0:
 				return &v.state
@@ -2652,18 +2935,19 @@ func file_bbgo_proto_init() {
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_bbgo_proto_rawDesc,
-			NumEnums:      0,
+			RawDescriptor: file_pkg_pb_bbgo_proto_rawDesc,
+			NumEnums:      4,
 			NumMessages:   25,
 			NumExtensions: 0,
-			NumServices:   1,
+			NumServices:   3,
 		},
-		GoTypes:           file_bbgo_proto_goTypes,
-		DependencyIndexes: file_bbgo_proto_depIdxs,
-		MessageInfos:      file_bbgo_proto_msgTypes,
+		GoTypes:           file_pkg_pb_bbgo_proto_goTypes,
+		DependencyIndexes: file_pkg_pb_bbgo_proto_depIdxs,
+		EnumInfos:         file_pkg_pb_bbgo_proto_enumTypes,
+		MessageInfos:      file_pkg_pb_bbgo_proto_msgTypes,
 	}.Build()
-	File_bbgo_proto = out.File
-	file_bbgo_proto_rawDesc = nil
-	file_bbgo_proto_goTypes = nil
-	file_bbgo_proto_depIdxs = nil
+	File_pkg_pb_bbgo_proto = out.File
+	file_pkg_pb_bbgo_proto_rawDesc = nil
+	file_pkg_pb_bbgo_proto_goTypes = nil
+	file_pkg_pb_bbgo_proto_depIdxs = nil
 }
diff --git a/pkg/pb/bbgo.proto b/pkg/pb/bbgo.proto
index f1ba64707..2996ad5b6 100644
--- a/pkg/pb/bbgo.proto
+++ b/pkg/pb/bbgo.proto
@@ -239,9 +239,9 @@ message QueryTradesResponse {
 message QueryKLinesRequest {
   string exchange = 1;
   string symbol = 2;
-  int64 limit = 3;
-  int64 interval = 4;  // time period of K line in minute
-  int64 timestamp = 5;
+  string interval = 3;  // time period of K line in minute
+  int64 timestamp = 4;
+  int64 limit = 5;
 }
 
 message QueryKLinesResponse {