diff --git a/pkg/bbgo/environment.go b/pkg/bbgo/environment.go
index a9be344c0..4aef7855e 100644
--- a/pkg/bbgo/environment.go
+++ b/pkg/bbgo/environment.go
@@ -285,9 +285,6 @@ func (environ *Environment) Init(ctx context.Context) (err error) {
 			}
 		}
 
-		if err := session.InitSymbols(ctx, environ); err != nil {
-			return err
-		}
 	}
 
 	return nil
diff --git a/pkg/bbgo/session.go b/pkg/bbgo/session.go
index 884643c03..c09f44b1d 100644
--- a/pkg/bbgo/session.go
+++ b/pkg/bbgo/session.go
@@ -267,18 +267,17 @@ func (session *ExchangeSession) Init(ctx context.Context, environ *Environment)
 		session.lastPrices[kline.Symbol] = kline.Close
 	})
 
+	if err := session.initUsedSymbols(ctx, environ); err != nil {
+		return err
+	}
+
 	session.IsInitialized = true
 	return nil
 }
 
-// InitSymbols uses usedSymbols to initialize the related data structure
-func (session *ExchangeSession) InitSymbols(ctx context.Context, environ *Environment) error {
+// initUsedSymbols uses usedSymbols to initialize the related data structure
+func (session *ExchangeSession) initUsedSymbols(ctx context.Context, environ *Environment) error {
 	for symbol := range session.usedSymbols {
-		// skip initialized symbols
-		if _, ok := session.initializedSymbols[symbol]; ok {
-			continue
-		}
-
 		if err := session.InitSymbol(ctx, environ, symbol); err != nil {
 			return err
 		}
@@ -291,7 +290,8 @@ func (session *ExchangeSession) InitSymbols(ctx context.Context, environ *Enviro
 // please note, InitSymbol can not be called for the same symbol for twice
 func (session *ExchangeSession) InitSymbol(ctx context.Context, environ *Environment, symbol string) error {
 	if _, ok := session.initializedSymbols[symbol]; ok {
-		return fmt.Errorf("symbol %s is already initialized", symbol)
+		// return fmt.Errorf("symbol %s is already initialized", symbol)
+		return nil
 	}
 
 	market, ok := session.markets[symbol]
diff --git a/pkg/cmd/pnl.go b/pkg/cmd/pnl.go
index 692d76ea4..93e0848d8 100644
--- a/pkg/cmd/pnl.go
+++ b/pkg/cmd/pnl.go
@@ -81,16 +81,12 @@ var PnLCmd = &cobra.Command{
 			return err
 		}
 
-		if err := environ.Init(ctx) ; err != nil {
-			return err
-		}
-
 		session, ok := environ.Session(sessionName)
 		if !ok {
 			return fmt.Errorf("session %s not found", sessionName)
 		}
 
-		if err := environ.Sync(ctx) ; err != nil {
+		if err := environ.SyncSession(ctx, session) ; err != nil {
 			return err
 		}