diff --git a/pkg/strategy/ewoDgtrd/strategy.go b/pkg/strategy/ewoDgtrd/strategy.go
index 4c3defc07..aea493531 100644
--- a/pkg/strategy/ewoDgtrd/strategy.go
+++ b/pkg/strategy/ewoDgtrd/strategy.go
@@ -834,7 +834,7 @@ func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, se
 		}
 	})
 
-	s.tradeCollector.OnPositionUpdate(func(position *types.Position) {
+	s.tradeCollector.OnPositionUpdate(func(position types.PositionInterface) {
 		log.Infof("position changed: %s", position)
 		s.Notify(s.Position)
 	})
diff --git a/pkg/strategy/grid/strategy.go b/pkg/strategy/grid/strategy.go
index af5a2bcab..5fb872bcc 100644
--- a/pkg/strategy/grid/strategy.go
+++ b/pkg/strategy/grid/strategy.go
@@ -620,7 +620,7 @@ func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, se
 		}
 	*/
 
-	s.tradeCollector.OnPositionUpdate(func(position *types.Position) {
+	s.tradeCollector.OnPositionUpdate(func(position types.PositionInterface) {
 		s.Notifiability.Notify(position)
 	})
 	s.tradeCollector.BindStream(session.UserDataStream)
diff --git a/pkg/strategy/pivotshort/strategy.go b/pkg/strategy/pivotshort/strategy.go
index 6976ee4d8..baf79a264 100644
--- a/pkg/strategy/pivotshort/strategy.go
+++ b/pkg/strategy/pivotshort/strategy.go
@@ -179,7 +179,7 @@ func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, se
 		}
 	})
 
-	s.tradeCollector.OnPositionUpdate(func(position *types.Position) {
+	s.tradeCollector.OnPositionUpdate(func(position types.PositionInterface) {
 		log.Infof("position changed: %s", s.Position)
 		s.Notify(s.Position)
 	})
diff --git a/pkg/strategy/support/strategy.go b/pkg/strategy/support/strategy.go
index 83768c56b..29392ddc1 100644
--- a/pkg/strategy/support/strategy.go
+++ b/pkg/strategy/support/strategy.go
@@ -499,13 +499,13 @@ func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, se
 
 	if !s.TrailingStopTarget.TrailingStopCallbackRatio.IsZero() {
 		// Update trailing stop when the position changes
-		s.tradeCollector.OnPositionUpdate(func(position *types.Position) {
+		s.tradeCollector.OnPositionUpdate(func(position types.PositionInterface) {
 			// StrategyController
 			if s.Status != types.StrategyStatusRunning {
 				return
 			}
 
-			if position.Base.Compare(s.Market.MinQuantity) > 0 { // Update order if we have a position
+			if position.(*types.Position).Base.Compare(s.Market.MinQuantity) > 0 { // Update order if we have a position
 				// Cancel the original order
 				if err := s.cancelOrder(s.trailingStopControl.OrderID, ctx, orderExecutor); err != nil {
 					log.WithError(err).Errorf("Can not cancel the original trailing stop order!")
@@ -515,12 +515,12 @@ func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, se
 				// Calculate minimum target price
 				var minTargetPrice = fixedpoint.Zero
 				if s.trailingStopControl.minimumProfitPercentage.Sign() > 0 {
-					minTargetPrice = position.AverageCost.Mul(fixedpoint.One.Add(s.trailingStopControl.minimumProfitPercentage))
+					minTargetPrice = position.(*types.Position).AverageCost.Mul(fixedpoint.One.Add(s.trailingStopControl.minimumProfitPercentage))
 				}
 
 				// Place new order if the target price is higher than the minimum target price
 				if s.trailingStopControl.IsHigherThanMin(minTargetPrice) {
-					orderForm := s.trailingStopControl.GenerateStopOrder(position.Base)
+					orderForm := s.trailingStopControl.GenerateStopOrder(position.(*types.Position).Base)
 					orders, err := s.submitOrders(ctx, orderExecutor, orderForm)
 					if err != nil {
 						log.WithError(err).Error("submit profit trailing stop order error")
diff --git a/pkg/strategy/wall/strategy.go b/pkg/strategy/wall/strategy.go
index 7fed0615c..a31d6c44d 100644
--- a/pkg/strategy/wall/strategy.go
+++ b/pkg/strategy/wall/strategy.go
@@ -302,7 +302,7 @@ func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, se
 		}
 	})
 
-	s.tradeCollector.OnPositionUpdate(func(position *types.Position) {
+	s.tradeCollector.OnPositionUpdate(func(position types.PositionInterface) {
 		log.Infof("position changed: %s", s.Position)
 		s.Notify(s.Position)
 	})
@@ -340,7 +340,6 @@ func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, se
 			log.WithError(err).Errorf("can not place order")
 		}
 
-
 		if err := s.activeAdjustmentOrders.GracefulCancel(ctx, s.session.Exchange); err != nil {
 			log.WithError(err).Errorf("graceful cancel order error")
 		}
diff --git a/pkg/strategy/xmaker/strategy.go b/pkg/strategy/xmaker/strategy.go
index 53ae10fde..a10a1d4bf 100644
--- a/pkg/strategy/xmaker/strategy.go
+++ b/pkg/strategy/xmaker/strategy.go
@@ -781,7 +781,7 @@ func (s *Strategy) CrossRun(ctx context.Context, orderExecutionRouter bbgo.Order
 		}
 	})
 
-	s.tradeCollector.OnPositionUpdate(func(position *types.Position) {
+	s.tradeCollector.OnPositionUpdate(func(position types.PositionInterface) {
 		s.Notifiability.Notify(position)
 	})
 	s.tradeCollector.OnRecover(func(trade types.Trade) {