diff --git a/pkg/strategy/xmaker/strategy.go b/pkg/strategy/xmaker/strategy.go
index 9522a85db..b5010bbbb 100644
--- a/pkg/strategy/xmaker/strategy.go
+++ b/pkg/strategy/xmaker/strategy.go
@@ -196,7 +196,7 @@ func (s *Strategy) updateQuote(ctx context.Context, orderExecutionRouter bbgo.Or
 		return
 	}
 
-	sourceBook := s.book.CopyDepth(20)
+	sourceBook := s.book.CopyDepth(10)
 	if valid, err := sourceBook.IsValid(); !valid {
 		log.WithError(err).Errorf("%s invalid copied order book, skip quoting: %v", s.Symbol, err)
 		return
diff --git a/pkg/types/rbtorderbook.go b/pkg/types/rbtorderbook.go
index 233988eca..eb5a04f7f 100644
--- a/pkg/types/rbtorderbook.go
+++ b/pkg/types/rbtorderbook.go
@@ -143,7 +143,7 @@ func (b *RBTOrderBook) Copy() OrderBook {
 func (b *RBTOrderBook) CopyDepth(limit int) OrderBook {
 	var book = NewRBOrderBook(b.Symbol)
 	book.Asks = b.Asks.CopyInorder(limit)
-	book.Bids = b.Bids.CopyInorder(limit)
+	book.Bids = b.Bids.CopyInorderReverse(limit)
 	return book
 }