diff --git a/bbgo/exchange/binance/exchange.go b/bbgo/exchange/binance/exchange.go
index 9e54124ee..c616b249d 100644
--- a/bbgo/exchange/binance/exchange.go
+++ b/bbgo/exchange/binance/exchange.go
@@ -227,7 +227,7 @@ func (e *Exchange) QueryAccount(ctx context.Context) (*types.Account, error) {
 	}, nil
 }
 
-func (e *Exchange) SubmitOrder(ctx context.Context, order *types.Order) error {
+func (e *Exchange) SubmitOrder(ctx context.Context, order *types.SubmitOrder) error {
 	/*
 		limit order example
 
@@ -250,10 +250,10 @@ func (e *Exchange) SubmitOrder(ctx context.Context, order *types.Order) error {
 		Symbol(order.Symbol).
 		Side(binance.SideType(order.Side)).
 		Type(orderType).
-		Quantity(order.VolumeStr)
+		Quantity(order.Quantity)
 
-	if len(order.PriceStr) > 0 {
-		req.Price(order.PriceStr)
+	if len(order.Price) > 0 {
+		req.Price(order.Price)
 	}
 	if len(order.TimeInForce) > 0 {
 		req.TimeInForce(order.TimeInForce)
diff --git a/bbgo/trader.go b/bbgo/trader.go
index ca4556c7a..a317b6ef9 100644
--- a/bbgo/trader.go
+++ b/bbgo/trader.go
@@ -24,11 +24,11 @@ type KLineRegressionTrader struct {
 	SourceKLines            []types.KLine
 	ProfitAndLossCalculator *ProfitAndLossCalculator
 
-	doneOrders    []*types.Order
-	pendingOrders []*types.Order
+	doneOrders    []*types.SubmitOrder
+	pendingOrders []*types.SubmitOrder
 }
 
-func (trader *KLineRegressionTrader) SubmitOrder(cxt context.Context, order *types.Order) {
+func (trader *KLineRegressionTrader) SubmitOrder(cxt context.Context, order *types.SubmitOrder) {
 	trader.pendingOrders = append(trader.pendingOrders, order)
 }
 
@@ -73,12 +73,12 @@ func (trader *KLineRegressionTrader) RunStrategy(ctx context.Context, strategy S
 
 			var price float64
 			if order.Type == types.OrderTypeLimit {
-				price = util.MustParseFloat(order.PriceStr)
+				price = util.MustParseFloat(order.Price)
 			} else {
 				price = kline.GetClose()
 			}
 
-			volume := util.MustParseFloat(order.VolumeStr)
+			volume := util.MustParseFloat(order.Quantity)
 			fee := 0.0
 			feeCurrency := ""
 
@@ -285,12 +285,12 @@ func (trader *Trader) ReportPnL() {
 	trader.Notifier.ReportPnL(report)
 }
 
-func (trader *Trader) SubmitOrder(ctx context.Context, order *types.Order) {
-	trader.Notifier.Notify(":memo: Submitting %s %s %s order with quantity: %s", order.Symbol, order.Type, order.Side, order.VolumeStr, order)
+func (trader *Trader) SubmitOrder(ctx context.Context, order *types.SubmitOrder) {
+	trader.Notifier.Notify(":memo: Submitting %s %s %s order with quantity: %s", order.Symbol, order.Type, order.Side, order.Quantity, order)
 
 	err := trader.Exchange.SubmitOrder(ctx, order)
 	if err != nil {
-		log.WithError(err).Errorf("order create error: side %s quantity: %s", order.Side, order.VolumeStr)
+		log.WithError(err).Errorf("order create error: side %s quantity: %s", order.Side, order.Quantity)
 		return
 	}
 }
diff --git a/bbgo/types/order.go b/bbgo/types/order.go
index 96997b3f5..b396ca53c 100644
--- a/bbgo/types/order.go
+++ b/bbgo/types/order.go
@@ -13,25 +13,25 @@ const (
 	OrderTypeMarket OrderType = "MARKET"
 )
 
-type Order struct {
-	Symbol    string
-	Side      SideType
-	Type      OrderType
-	VolumeStr string
-	PriceStr  string
+type SubmitOrder struct {
+	Symbol   string
+	Side     SideType
+	Type     OrderType
+	Quantity string
+	Price    string
 
 	TimeInForce binance.TimeInForceType
 }
 
-func (o *Order) SlackAttachment() slack.Attachment {
+func (o *SubmitOrder) SlackAttachment() slack.Attachment {
 	var fields = []slack.AttachmentField{
 		{Title: "Symbol", Value: o.Symbol, Short: true},
 		{Title: "Side", Value: string(o.Side), Short: true},
-		{Title: "Volume", Value: o.VolumeStr, Short: true},
+		{Title: "Volume", Value: o.Quantity, Short: true},
 	}
 
-	if len(o.PriceStr) > 0 {
-		fields = append(fields, slack.AttachmentField{Title: "Price", Value: o.PriceStr, Short: true})
+	if len(o.Price) > 0 {
+		fields = append(fields, slack.AttachmentField{Title: "Price", Value: o.Price, Short: true})
 	}
 
 	return slack.Attachment{
diff --git a/bbgo/types/trader.go b/bbgo/types/trader.go
index 7cf1e06d9..bf4ebcc4a 100644
--- a/bbgo/types/trader.go
+++ b/bbgo/types/trader.go
@@ -3,5 +3,5 @@ package types
 import "context"
 
 type Trader interface {
-	SubmitOrder(ctx context.Context, order *Order)
+	SubmitOrder(ctx context.Context, order *SubmitOrder)
 }