diff --git a/pkg/pb/bbgo.pb.go b/pkg/pb/bbgo.pb.go
index ea80b213c..da4763e17 100644
--- a/pkg/pb/bbgo.pb.go
+++ b/pkg/pb/bbgo.pb.go
@@ -143,7 +143,18 @@ type SubscribeResponse struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	SuccessResponses []*SuccessResponse `protobuf:"bytes,1,rep,name=success_responses,json=successResponses,proto3" json:"success_responses,omitempty"`
+	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, user
+	Event        string     `protobuf:"bytes,3,opt,name=event,proto3" json:"event,omitempty"`     // snapshot, update, order_snapshot, ...
+	Symbol       string     `protobuf:"bytes,4,opt,name=symbol,proto3" json:"symbol,omitempty"`
+	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"`
+	Orders       []*Order   `protobuf:"bytes,8,rep,name=orders,proto3" json:"orders,omitempty"`
+	Balances     []*Balance `protobuf:"bytes,9,rep,name=balances,proto3" json:"balances,omitempty"`
+	SubscribedAt int64      `protobuf:"varint,10,opt,name=subscribed_at,json=subscribedAt,proto3" json:"subscribed_at,omitempty"`
+	ErrorCode    int64      `protobuf:"varint,11,opt,name=error_code,json=errorCode,proto3" json:"error_code,omitempty"`
+	ErrorMessage string     `protobuf:"bytes,12,opt,name=error_message,json=errorMessage,proto3" json:"error_message,omitempty"`
 }
 
 func (x *SubscribeResponse) Reset() {
@@ -178,132 +189,90 @@ func (*SubscribeResponse) Descriptor() ([]byte, []int) {
 	return file_bbgo_proto_rawDescGZIP(), []int{2}
 }
 
-func (x *SubscribeResponse) GetSuccessResponses() []*SuccessResponse {
-	if x != nil {
-		return x.SuccessResponses
-	}
-	return nil
-}
-
-type SuccessResponse struct {
-	state         protoimpl.MessageState
-	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, user
-	Event     string     `protobuf:"bytes,3,opt,name=event,proto3" json:"event,omitempty"`     // snapshot, update, order_snapshot, ...
-	Symbol    string     `protobuf:"bytes,4,opt,name=symbol,proto3" json:"symbol,omitempty"`
-	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"`
-	Orders    []*Order   `protobuf:"bytes,8,rep,name=orders,proto3" json:"orders,omitempty"`
-	Balances  []*Balance `protobuf:"bytes,9,rep,name=balances,proto3" json:"balances,omitempty"`
-	CreatedAt int64      `protobuf:"varint,10,opt,name=created_at,json=createdAt,proto3" json:"created_at,omitempty"`
-}
-
-func (x *SuccessResponse) Reset() {
-	*x = SuccessResponse{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[3]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *SuccessResponse) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*SuccessResponse) ProtoMessage() {}
-
-func (x *SuccessResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[3]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use SuccessResponse.ProtoReflect.Descriptor instead.
-func (*SuccessResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{3}
-}
-
-func (x *SuccessResponse) GetExchange() string {
+func (x *SubscribeResponse) GetExchange() string {
 	if x != nil {
 		return x.Exchange
 	}
 	return ""
 }
 
-func (x *SuccessResponse) GetChannel() string {
+func (x *SubscribeResponse) GetChannel() string {
 	if x != nil {
 		return x.Channel
 	}
 	return ""
 }
 
-func (x *SuccessResponse) GetEvent() string {
+func (x *SubscribeResponse) GetEvent() string {
 	if x != nil {
 		return x.Event
 	}
 	return ""
 }
 
-func (x *SuccessResponse) GetSymbol() string {
+func (x *SubscribeResponse) GetSymbol() string {
 	if x != nil {
 		return x.Symbol
 	}
 	return ""
 }
 
-func (x *SuccessResponse) GetDepth() *Depth {
+func (x *SubscribeResponse) GetDepth() *Depth {
 	if x != nil {
 		return x.Depth
 	}
 	return nil
 }
 
-func (x *SuccessResponse) GetTrades() []*Trade {
+func (x *SubscribeResponse) GetTrades() []*Trade {
 	if x != nil {
 		return x.Trades
 	}
 	return nil
 }
 
-func (x *SuccessResponse) GetTicker() *Ticker {
+func (x *SubscribeResponse) GetTicker() *Ticker {
 	if x != nil {
 		return x.Ticker
 	}
 	return nil
 }
 
-func (x *SuccessResponse) GetOrders() []*Order {
+func (x *SubscribeResponse) GetOrders() []*Order {
 	if x != nil {
 		return x.Orders
 	}
 	return nil
 }
 
-func (x *SuccessResponse) GetBalances() []*Balance {
+func (x *SubscribeResponse) GetBalances() []*Balance {
 	if x != nil {
 		return x.Balances
 	}
 	return nil
 }
 
-func (x *SuccessResponse) GetCreatedAt() int64 {
+func (x *SubscribeResponse) GetSubscribedAt() int64 {
 	if x != nil {
-		return x.CreatedAt
+		return x.SubscribedAt
 	}
 	return 0
 }
 
+func (x *SubscribeResponse) GetErrorCode() int64 {
+	if x != nil {
+		return x.ErrorCode
+	}
+	return 0
+}
+
+func (x *SubscribeResponse) GetErrorMessage() string {
+	if x != nil {
+		return x.ErrorMessage
+	}
+	return ""
+}
+
 type Depth struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -318,7 +287,7 @@ type Depth struct {
 func (x *Depth) Reset() {
 	*x = Depth{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[4]
+		mi := &file_bbgo_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -331,7 +300,7 @@ func (x *Depth) String() string {
 func (*Depth) ProtoMessage() {}
 
 func (x *Depth) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[4]
+	mi := &file_bbgo_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -344,7 +313,7 @@ func (x *Depth) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Depth.ProtoReflect.Descriptor instead.
 func (*Depth) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{4}
+	return file_bbgo_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *Depth) GetExchange() string {
@@ -387,7 +356,7 @@ type PriceVolume struct {
 func (x *PriceVolume) Reset() {
 	*x = PriceVolume{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[5]
+		mi := &file_bbgo_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -400,7 +369,7 @@ func (x *PriceVolume) String() string {
 func (*PriceVolume) ProtoMessage() {}
 
 func (x *PriceVolume) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[5]
+	mi := &file_bbgo_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -413,7 +382,7 @@ func (x *PriceVolume) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PriceVolume.ProtoReflect.Descriptor instead.
 func (*PriceVolume) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{5}
+	return file_bbgo_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *PriceVolume) GetPrice() int64 {
@@ -453,7 +422,7 @@ type Trade struct {
 func (x *Trade) Reset() {
 	*x = Trade{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[6]
+		mi := &file_bbgo_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -466,7 +435,7 @@ func (x *Trade) String() string {
 func (*Trade) ProtoMessage() {}
 
 func (x *Trade) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[6]
+	mi := &file_bbgo_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -479,7 +448,7 @@ func (x *Trade) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Trade.ProtoReflect.Descriptor instead.
 func (*Trade) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{6}
+	return file_bbgo_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *Trade) GetExchange() string {
@@ -575,7 +544,7 @@ type Ticker struct {
 func (x *Ticker) Reset() {
 	*x = Ticker{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[7]
+		mi := &file_bbgo_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -588,7 +557,7 @@ func (x *Ticker) String() string {
 func (*Ticker) ProtoMessage() {}
 
 func (x *Ticker) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[7]
+	mi := &file_bbgo_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -601,7 +570,7 @@ func (x *Ticker) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Ticker.ProtoReflect.Descriptor instead.
 func (*Ticker) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{7}
+	return file_bbgo_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *Ticker) GetOpen() float64 {
@@ -665,7 +634,7 @@ type Order struct {
 func (x *Order) Reset() {
 	*x = Order{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[8]
+		mi := &file_bbgo_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -678,7 +647,7 @@ func (x *Order) String() string {
 func (*Order) ProtoMessage() {}
 
 func (x *Order) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[8]
+	mi := &file_bbgo_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -691,7 +660,7 @@ func (x *Order) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Order.ProtoReflect.Descriptor instead.
 func (*Order) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{8}
+	return file_bbgo_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *Order) GetExchange() string {
@@ -818,7 +787,7 @@ type SubmitOrder struct {
 func (x *SubmitOrder) Reset() {
 	*x = SubmitOrder{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[9]
+		mi := &file_bbgo_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -831,7 +800,7 @@ func (x *SubmitOrder) String() string {
 func (*SubmitOrder) ProtoMessage() {}
 
 func (x *SubmitOrder) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[9]
+	mi := &file_bbgo_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -844,7 +813,7 @@ func (x *SubmitOrder) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitOrder.ProtoReflect.Descriptor instead.
 func (*SubmitOrder) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{9}
+	return file_bbgo_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *SubmitOrder) GetExchange() string {
@@ -924,7 +893,7 @@ type Balance struct {
 func (x *Balance) Reset() {
 	*x = Balance{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[10]
+		mi := &file_bbgo_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -937,7 +906,7 @@ func (x *Balance) String() string {
 func (*Balance) ProtoMessage() {}
 
 func (x *Balance) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[10]
+	mi := &file_bbgo_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -950,7 +919,7 @@ func (x *Balance) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Balance.ProtoReflect.Descriptor instead.
 func (*Balance) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{10}
+	return file_bbgo_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *Balance) GetCurrency() string {
@@ -985,7 +954,7 @@ type SubmitOrderRequest struct {
 func (x *SubmitOrderRequest) Reset() {
 	*x = SubmitOrderRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[11]
+		mi := &file_bbgo_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -998,7 +967,7 @@ func (x *SubmitOrderRequest) String() string {
 func (*SubmitOrderRequest) ProtoMessage() {}
 
 func (x *SubmitOrderRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[11]
+	mi := &file_bbgo_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1011,7 +980,7 @@ func (x *SubmitOrderRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitOrderRequest.ProtoReflect.Descriptor instead.
 func (*SubmitOrderRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{11}
+	return file_bbgo_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *SubmitOrderRequest) GetSubmitOrder() *SubmitOrder {
@@ -1033,7 +1002,7 @@ type SubmitOrderResponse struct {
 func (x *SubmitOrderResponse) Reset() {
 	*x = SubmitOrderResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[12]
+		mi := &file_bbgo_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1046,7 +1015,7 @@ func (x *SubmitOrderResponse) String() string {
 func (*SubmitOrderResponse) ProtoMessage() {}
 
 func (x *SubmitOrderResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[12]
+	mi := &file_bbgo_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1059,7 +1028,7 @@ func (x *SubmitOrderResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitOrderResponse.ProtoReflect.Descriptor instead.
 func (*SubmitOrderResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{12}
+	return file_bbgo_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *SubmitOrderResponse) GetExchange() string {
@@ -1089,7 +1058,7 @@ type CancelOrderRequest struct {
 func (x *CancelOrderRequest) Reset() {
 	*x = CancelOrderRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[13]
+		mi := &file_bbgo_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1102,7 +1071,7 @@ func (x *CancelOrderRequest) String() string {
 func (*CancelOrderRequest) ProtoMessage() {}
 
 func (x *CancelOrderRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[13]
+	mi := &file_bbgo_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1115,7 +1084,7 @@ func (x *CancelOrderRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CancelOrderRequest.ProtoReflect.Descriptor instead.
 func (*CancelOrderRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{13}
+	return file_bbgo_proto_rawDescGZIP(), []int{12}
 }
 
 func (x *CancelOrderRequest) GetExchange() string {
@@ -1152,7 +1121,7 @@ type CancelOrderResponse struct {
 func (x *CancelOrderResponse) Reset() {
 	*x = CancelOrderResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[14]
+		mi := &file_bbgo_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1165,7 +1134,7 @@ func (x *CancelOrderResponse) String() string {
 func (*CancelOrderResponse) ProtoMessage() {}
 
 func (x *CancelOrderResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[14]
+	mi := &file_bbgo_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1178,7 +1147,7 @@ func (x *CancelOrderResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CancelOrderResponse.ProtoReflect.Descriptor instead.
 func (*CancelOrderResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{14}
+	return file_bbgo_proto_rawDescGZIP(), []int{13}
 }
 
 func (x *CancelOrderResponse) GetExchange() string {
@@ -1214,7 +1183,7 @@ type QueryOrderRequest struct {
 func (x *QueryOrderRequest) Reset() {
 	*x = QueryOrderRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[15]
+		mi := &file_bbgo_proto_msgTypes[14]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1227,7 +1196,7 @@ func (x *QueryOrderRequest) String() string {
 func (*QueryOrderRequest) ProtoMessage() {}
 
 func (x *QueryOrderRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[15]
+	mi := &file_bbgo_proto_msgTypes[14]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1240,7 +1209,7 @@ func (x *QueryOrderRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryOrderRequest.ProtoReflect.Descriptor instead.
 func (*QueryOrderRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{15}
+	return file_bbgo_proto_rawDescGZIP(), []int{14}
 }
 
 func (x *QueryOrderRequest) GetId() int64 {
@@ -1269,7 +1238,7 @@ type QueryOrderResponse struct {
 func (x *QueryOrderResponse) Reset() {
 	*x = QueryOrderResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[16]
+		mi := &file_bbgo_proto_msgTypes[15]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1282,7 +1251,7 @@ func (x *QueryOrderResponse) String() string {
 func (*QueryOrderResponse) ProtoMessage() {}
 
 func (x *QueryOrderResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[16]
+	mi := &file_bbgo_proto_msgTypes[15]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1295,7 +1264,7 @@ func (x *QueryOrderResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryOrderResponse.ProtoReflect.Descriptor instead.
 func (*QueryOrderResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{16}
+	return file_bbgo_proto_rawDescGZIP(), []int{15}
 }
 
 func (x *QueryOrderResponse) GetOrder() *Order {
@@ -1331,7 +1300,7 @@ type QueryOrdersRequest struct {
 func (x *QueryOrdersRequest) Reset() {
 	*x = QueryOrdersRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[17]
+		mi := &file_bbgo_proto_msgTypes[16]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1344,7 +1313,7 @@ func (x *QueryOrdersRequest) String() string {
 func (*QueryOrdersRequest) ProtoMessage() {}
 
 func (x *QueryOrdersRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[17]
+	mi := &file_bbgo_proto_msgTypes[16]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1357,7 +1326,7 @@ func (x *QueryOrdersRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryOrdersRequest.ProtoReflect.Descriptor instead.
 func (*QueryOrdersRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{17}
+	return file_bbgo_proto_rawDescGZIP(), []int{16}
 }
 
 func (x *QueryOrdersRequest) GetExchange() string {
@@ -1436,7 +1405,7 @@ type QueryOrdersResponse struct {
 func (x *QueryOrdersResponse) Reset() {
 	*x = QueryOrdersResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[18]
+		mi := &file_bbgo_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1449,7 +1418,7 @@ func (x *QueryOrdersResponse) String() string {
 func (*QueryOrdersResponse) ProtoMessage() {}
 
 func (x *QueryOrdersResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[18]
+	mi := &file_bbgo_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1462,7 +1431,7 @@ func (x *QueryOrdersResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryOrdersResponse.ProtoReflect.Descriptor instead.
 func (*QueryOrdersResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{18}
+	return file_bbgo_proto_rawDescGZIP(), []int{17}
 }
 
 func (x *QueryOrdersResponse) GetExchange() string {
@@ -1506,7 +1475,7 @@ type QueryTradesRequest struct {
 func (x *QueryTradesRequest) Reset() {
 	*x = QueryTradesRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[19]
+		mi := &file_bbgo_proto_msgTypes[18]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1519,7 +1488,7 @@ func (x *QueryTradesRequest) String() string {
 func (*QueryTradesRequest) ProtoMessage() {}
 
 func (x *QueryTradesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[19]
+	mi := &file_bbgo_proto_msgTypes[18]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1532,7 +1501,7 @@ func (x *QueryTradesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryTradesRequest.ProtoReflect.Descriptor instead.
 func (*QueryTradesRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{19}
+	return file_bbgo_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *QueryTradesRequest) GetExchange() string {
@@ -1617,7 +1586,7 @@ type QueryTradesResponse struct {
 func (x *QueryTradesResponse) Reset() {
 	*x = QueryTradesResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[20]
+		mi := &file_bbgo_proto_msgTypes[19]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1630,7 +1599,7 @@ func (x *QueryTradesResponse) String() string {
 func (*QueryTradesResponse) ProtoMessage() {}
 
 func (x *QueryTradesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[20]
+	mi := &file_bbgo_proto_msgTypes[19]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1643,7 +1612,7 @@ func (x *QueryTradesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryTradesResponse.ProtoReflect.Descriptor instead.
 func (*QueryTradesResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{20}
+	return file_bbgo_proto_rawDescGZIP(), []int{19}
 }
 
 func (x *QueryTradesResponse) GetTrades() []*Trade {
@@ -1675,7 +1644,7 @@ type QueryKLinesRequest struct {
 func (x *QueryKLinesRequest) Reset() {
 	*x = QueryKLinesRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[21]
+		mi := &file_bbgo_proto_msgTypes[20]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1688,7 +1657,7 @@ func (x *QueryKLinesRequest) String() string {
 func (*QueryKLinesRequest) ProtoMessage() {}
 
 func (x *QueryKLinesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[21]
+	mi := &file_bbgo_proto_msgTypes[20]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1701,7 +1670,7 @@ func (x *QueryKLinesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryKLinesRequest.ProtoReflect.Descriptor instead.
 func (*QueryKLinesRequest) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{21}
+	return file_bbgo_proto_rawDescGZIP(), []int{20}
 }
 
 func (x *QueryKLinesRequest) GetExchange() string {
@@ -1751,7 +1720,7 @@ type QueryKLinesResponse struct {
 func (x *QueryKLinesResponse) Reset() {
 	*x = QueryKLinesResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[22]
+		mi := &file_bbgo_proto_msgTypes[21]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1764,7 +1733,7 @@ func (x *QueryKLinesResponse) String() string {
 func (*QueryKLinesResponse) ProtoMessage() {}
 
 func (x *QueryKLinesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[22]
+	mi := &file_bbgo_proto_msgTypes[21]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1777,7 +1746,7 @@ func (x *QueryKLinesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryKLinesResponse.ProtoReflect.Descriptor instead.
 func (*QueryKLinesResponse) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{22}
+	return file_bbgo_proto_rawDescGZIP(), []int{21}
 }
 
 func (x *QueryKLinesResponse) GetKlines() []*KLine {
@@ -1813,7 +1782,7 @@ type KLine struct {
 func (x *KLine) Reset() {
 	*x = KLine{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_bbgo_proto_msgTypes[23]
+		mi := &file_bbgo_proto_msgTypes[22]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1826,7 +1795,7 @@ func (x *KLine) String() string {
 func (*KLine) ProtoMessage() {}
 
 func (x *KLine) ProtoReflect() protoreflect.Message {
-	mi := &file_bbgo_proto_msgTypes[23]
+	mi := &file_bbgo_proto_msgTypes[22]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1839,7 +1808,7 @@ func (x *KLine) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KLine.ProtoReflect.Descriptor instead.
 func (*KLine) Descriptor() ([]byte, []int) {
-	return file_bbgo_proto_rawDescGZIP(), []int{23}
+	return file_bbgo_proto_rawDescGZIP(), []int{22}
 }
 
 func (x *KLine) GetExchange() string {
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 }
 
 var (
@@ -2187,69 +2155,67 @@ func file_bbgo_proto_rawDescGZIP() []byte {
 	return file_bbgo_proto_rawDescData
 }
 
-var file_bbgo_proto_msgTypes = make([]protoimpl.MessageInfo, 24)
+var file_bbgo_proto_msgTypes = make([]protoimpl.MessageInfo, 23)
 var file_bbgo_proto_goTypes = []interface{}{
 	(*SubscribeRequest)(nil),    // 0: pb.SubscribeRequest
 	(*Subscription)(nil),        // 1: pb.Subscription
 	(*SubscribeResponse)(nil),   // 2: pb.SubscribeResponse
-	(*SuccessResponse)(nil),     // 3: pb.SuccessResponse
-	(*Depth)(nil),               // 4: pb.Depth
-	(*PriceVolume)(nil),         // 5: pb.PriceVolume
-	(*Trade)(nil),               // 6: pb.Trade
-	(*Ticker)(nil),              // 7: pb.Ticker
-	(*Order)(nil),               // 8: pb.Order
-	(*SubmitOrder)(nil),         // 9: pb.SubmitOrder
-	(*Balance)(nil),             // 10: pb.Balance
-	(*SubmitOrderRequest)(nil),  // 11: pb.SubmitOrderRequest
-	(*SubmitOrderResponse)(nil), // 12: pb.SubmitOrderResponse
-	(*CancelOrderRequest)(nil),  // 13: pb.CancelOrderRequest
-	(*CancelOrderResponse)(nil), // 14: pb.CancelOrderResponse
-	(*QueryOrderRequest)(nil),   // 15: pb.QueryOrderRequest
-	(*QueryOrderResponse)(nil),  // 16: pb.QueryOrderResponse
-	(*QueryOrdersRequest)(nil),  // 17: pb.QueryOrdersRequest
-	(*QueryOrdersResponse)(nil), // 18: pb.QueryOrdersResponse
-	(*QueryTradesRequest)(nil),  // 19: pb.QueryTradesRequest
-	(*QueryTradesResponse)(nil), // 20: pb.QueryTradesResponse
-	(*QueryKLinesRequest)(nil),  // 21: pb.QueryKLinesRequest
-	(*QueryKLinesResponse)(nil), // 22: pb.QueryKLinesResponse
-	(*KLine)(nil),               // 23: pb.KLine
+	(*Depth)(nil),               // 3: pb.Depth
+	(*PriceVolume)(nil),         // 4: pb.PriceVolume
+	(*Trade)(nil),               // 5: pb.Trade
+	(*Ticker)(nil),              // 6: pb.Ticker
+	(*Order)(nil),               // 7: pb.Order
+	(*SubmitOrder)(nil),         // 8: pb.SubmitOrder
+	(*Balance)(nil),             // 9: pb.Balance
+	(*SubmitOrderRequest)(nil),  // 10: pb.SubmitOrderRequest
+	(*SubmitOrderResponse)(nil), // 11: pb.SubmitOrderResponse
+	(*CancelOrderRequest)(nil),  // 12: pb.CancelOrderRequest
+	(*CancelOrderResponse)(nil), // 13: pb.CancelOrderResponse
+	(*QueryOrderRequest)(nil),   // 14: pb.QueryOrderRequest
+	(*QueryOrderResponse)(nil),  // 15: pb.QueryOrderResponse
+	(*QueryOrdersRequest)(nil),  // 16: pb.QueryOrdersRequest
+	(*QueryOrdersResponse)(nil), // 17: pb.QueryOrdersResponse
+	(*QueryTradesRequest)(nil),  // 18: pb.QueryTradesRequest
+	(*QueryTradesResponse)(nil), // 19: pb.QueryTradesResponse
+	(*QueryKLinesRequest)(nil),  // 20: pb.QueryKLinesRequest
+	(*QueryKLinesResponse)(nil), // 21: pb.QueryKLinesResponse
+	(*KLine)(nil),               // 22: pb.KLine
 }
 var file_bbgo_proto_depIdxs = []int32{
 	1,  // 0: pb.SubscribeRequest.subscriptions:type_name -> pb.Subscription
-	3,  // 1: pb.SubscribeResponse.success_responses:type_name -> pb.SuccessResponse
-	4,  // 2: pb.SuccessResponse.depth:type_name -> pb.Depth
-	6,  // 3: pb.SuccessResponse.trades:type_name -> pb.Trade
-	7,  // 4: pb.SuccessResponse.ticker:type_name -> pb.Ticker
-	8,  // 5: pb.SuccessResponse.orders:type_name -> pb.Order
-	10, // 6: pb.SuccessResponse.balances:type_name -> pb.Balance
-	5,  // 7: pb.Depth.asks:type_name -> pb.PriceVolume
-	5,  // 8: pb.Depth.bids:type_name -> pb.PriceVolume
-	9,  // 9: pb.SubmitOrderRequest.submit_order:type_name -> pb.SubmitOrder
-	8,  // 10: pb.SubmitOrderResponse.order:type_name -> pb.Order
-	8,  // 11: pb.CancelOrderResponse.order:type_name -> pb.Order
-	8,  // 12: pb.QueryOrderResponse.order:type_name -> pb.Order
-	8,  // 13: pb.QueryOrdersResponse.orders:type_name -> pb.Order
-	6,  // 14: pb.QueryTradesResponse.trades:type_name -> pb.Trade
-	23, // 15: pb.QueryKLinesResponse.klines:type_name -> pb.KLine
-	0,  // 16: pb.BBGO.Subcribe:input_type -> pb.SubscribeRequest
-	11, // 17: pb.BBGO.SubmitOrder:input_type -> pb.SubmitOrderRequest
-	13, // 18: pb.BBGO.CancelOrder:input_type -> pb.CancelOrderRequest
-	15, // 19: pb.BBGO.QueryOrder:input_type -> pb.QueryOrderRequest
-	17, // 20: pb.BBGO.QueryOrders:input_type -> pb.QueryOrdersRequest
-	19, // 21: pb.BBGO.QueryTrades:input_type -> pb.QueryTradesRequest
-	21, // 22: pb.BBGO.QueryKLines:input_type -> pb.QueryKLinesRequest
-	2,  // 23: pb.BBGO.Subcribe:output_type -> pb.SubscribeResponse
-	12, // 24: pb.BBGO.SubmitOrder:output_type -> pb.SubmitOrderResponse
-	14, // 25: pb.BBGO.CancelOrder:output_type -> pb.CancelOrderResponse
-	16, // 26: pb.BBGO.QueryOrder:output_type -> pb.QueryOrderResponse
-	18, // 27: pb.BBGO.QueryOrders:output_type -> pb.QueryOrdersResponse
-	20, // 28: pb.BBGO.QueryTrades:output_type -> pb.QueryTradesResponse
-	22, // 29: pb.BBGO.QueryKLines:output_type -> pb.QueryKLinesResponse
-	23, // [23:30] is the sub-list for method output_type
-	16, // [16:23] is the sub-list for method input_type
-	16, // [16:16] is the sub-list for extension type_name
-	16, // [16:16] is the sub-list for extension extendee
-	0,  // [0:16] is the sub-list for field type_name
+	3,  // 1: pb.SubscribeResponse.depth:type_name -> pb.Depth
+	5,  // 2: pb.SubscribeResponse.trades:type_name -> pb.Trade
+	6,  // 3: pb.SubscribeResponse.ticker:type_name -> pb.Ticker
+	7,  // 4: pb.SubscribeResponse.orders:type_name -> pb.Order
+	9,  // 5: pb.SubscribeResponse.balances:type_name -> pb.Balance
+	4,  // 6: pb.Depth.asks:type_name -> pb.PriceVolume
+	4,  // 7: pb.Depth.bids:type_name -> pb.PriceVolume
+	8,  // 8: pb.SubmitOrderRequest.submit_order:type_name -> pb.SubmitOrder
+	7,  // 9: pb.SubmitOrderResponse.order:type_name -> pb.Order
+	7,  // 10: pb.CancelOrderResponse.order:type_name -> pb.Order
+	7,  // 11: pb.QueryOrderResponse.order:type_name -> pb.Order
+	7,  // 12: pb.QueryOrdersResponse.orders:type_name -> pb.Order
+	5,  // 13: pb.QueryTradesResponse.trades:type_name -> pb.Trade
+	22, // 14: pb.QueryKLinesResponse.klines:type_name -> pb.KLine
+	0,  // 15: pb.BBGO.Subcribe:input_type -> pb.SubscribeRequest
+	10, // 16: pb.BBGO.SubmitOrder:input_type -> pb.SubmitOrderRequest
+	12, // 17: pb.BBGO.CancelOrder:input_type -> pb.CancelOrderRequest
+	14, // 18: pb.BBGO.QueryOrder:input_type -> pb.QueryOrderRequest
+	16, // 19: pb.BBGO.QueryOrders:input_type -> pb.QueryOrdersRequest
+	18, // 20: pb.BBGO.QueryTrades:input_type -> pb.QueryTradesRequest
+	20, // 21: pb.BBGO.QueryKLines:input_type -> pb.QueryKLinesRequest
+	2,  // 22: pb.BBGO.Subcribe:output_type -> pb.SubscribeResponse
+	11, // 23: pb.BBGO.SubmitOrder:output_type -> pb.SubmitOrderResponse
+	13, // 24: pb.BBGO.CancelOrder:output_type -> pb.CancelOrderResponse
+	15, // 25: pb.BBGO.QueryOrder:output_type -> pb.QueryOrderResponse
+	17, // 26: pb.BBGO.QueryOrders:output_type -> pb.QueryOrdersResponse
+	19, // 27: pb.BBGO.QueryTrades:output_type -> pb.QueryTradesResponse
+	21, // 28: pb.BBGO.QueryKLines:output_type -> pb.QueryKLinesResponse
+	22, // [22:29] is the sub-list for method output_type
+	15, // [15:22] is the sub-list for method input_type
+	15, // [15:15] is the sub-list for extension type_name
+	15, // [15:15] is the sub-list for extension extendee
+	0,  // [0:15] is the sub-list for field type_name
 }
 
 func init() { file_bbgo_proto_init() }
@@ -2295,18 +2261,6 @@ func file_bbgo_proto_init() {
 			}
 		}
 		file_bbgo_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*SuccessResponse); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-		file_bbgo_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Depth); i {
 			case 0:
 				return &v.state
@@ -2318,7 +2272,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*PriceVolume); i {
 			case 0:
 				return &v.state
@@ -2330,7 +2284,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Trade); i {
 			case 0:
 				return &v.state
@@ -2342,7 +2296,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Ticker); i {
 			case 0:
 				return &v.state
@@ -2354,7 +2308,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Order); i {
 			case 0:
 				return &v.state
@@ -2366,7 +2320,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SubmitOrder); i {
 			case 0:
 				return &v.state
@@ -2378,7 +2332,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Balance); i {
 			case 0:
 				return &v.state
@@ -2390,7 +2344,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SubmitOrderRequest); i {
 			case 0:
 				return &v.state
@@ -2402,7 +2356,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SubmitOrderResponse); i {
 			case 0:
 				return &v.state
@@ -2414,7 +2368,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*CancelOrderRequest); i {
 			case 0:
 				return &v.state
@@ -2426,7 +2380,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*CancelOrderResponse); i {
 			case 0:
 				return &v.state
@@ -2438,7 +2392,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryOrderRequest); i {
 			case 0:
 				return &v.state
@@ -2450,7 +2404,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryOrderResponse); i {
 			case 0:
 				return &v.state
@@ -2462,7 +2416,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryOrdersRequest); i {
 			case 0:
 				return &v.state
@@ -2474,7 +2428,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryOrdersResponse); i {
 			case 0:
 				return &v.state
@@ -2486,7 +2440,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[19].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryTradesRequest); i {
 			case 0:
 				return &v.state
@@ -2498,7 +2452,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[20].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[19].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryTradesResponse); i {
 			case 0:
 				return &v.state
@@ -2510,7 +2464,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[21].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[20].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryKLinesRequest); i {
 			case 0:
 				return &v.state
@@ -2522,7 +2476,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[22].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[21].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryKLinesResponse); i {
 			case 0:
 				return &v.state
@@ -2534,7 +2488,7 @@ func file_bbgo_proto_init() {
 				return nil
 			}
 		}
-		file_bbgo_proto_msgTypes[23].Exporter = func(v interface{}, i int) interface{} {
+		file_bbgo_proto_msgTypes[22].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*KLine); i {
 			case 0:
 				return &v.state
@@ -2553,7 +2507,7 @@ func file_bbgo_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_bbgo_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   24,
+			NumMessages:   23,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/pkg/pb/bbgo.proto b/pkg/pb/bbgo.proto
index 69a66df9a..482b89977 100644
--- a/pkg/pb/bbgo.proto
+++ b/pkg/pb/bbgo.proto
@@ -29,10 +29,6 @@ message Subscription {
 }
 
 message SubscribeResponse {
-    repeated SuccessResponse success_responses = 1;
-}
-
-message SuccessResponse {
     string exchange = 1;
     string channel = 2;  // book, trade, ticker, user
     string event = 3;    // snapshot, update, order_snapshot, ...
@@ -42,7 +38,9 @@ message SuccessResponse {
     Ticker ticker = 7;
     repeated Order orders = 8;
     repeated Balance balances = 9;
-    int64 created_at = 10;
+    int64 subscribed_at = 10;
+    int64 error_code = 11;
+    string error_message = 12;
 }
 
 message Depth {