diff --git a/pkg/bbgo/exit_trailing_stop.go b/pkg/bbgo/exit_trailing_stop.go
index 6ba12ca34..1cb54ce2f 100644
--- a/pkg/bbgo/exit_trailing_stop.go
+++ b/pkg/bbgo/exit_trailing_stop.go
@@ -19,8 +19,13 @@ type TrailingStop2 struct {
 	ActivationRatio fixedpoint.Value `json:"activationRatio,omitempty"`
 
 	// ClosePosition is a percentage of the position to be closed
+	// Deprecated: please use Partial instead
 	ClosePosition fixedpoint.Value `json:"closePosition,omitempty"`
 
+	// Partial is a percentage of the position to be closed
+	// 50% means you will close halt the position
+	Partial fixedpoint.Value `json:"partial,omitempty"`
+
 	// MinProfit is the percentage of the minimum profit ratio.
 	// Stop order will be activated only when the price reaches above this threshold.
 	MinProfit fixedpoint.Value `json:"minProfit,omitempty"`
@@ -177,9 +182,15 @@ func (s *TrailingStop2) triggerStop(price fixedpoint.Value) error {
 	Notify("[TrailingStop] %s stop loss triggered. price: %f callback rate: %f", s.Symbol, price.Float64(), s.CallbackRate.Float64())
 	ctx := context.Background()
 	p := fixedpoint.One
+
+	// this is for legacy
 	if !s.ClosePosition.IsZero() {
 		p = s.ClosePosition
 	}
 
+	if !s.Partial.IsZero() {
+		p = s.Partial
+	}
+
 	return s.orderExecutor.ClosePosition(ctx, p, "trailingStop")
 }