diff --git a/pkg/exchange/util.go b/pkg/exchange/util.go
new file mode 100644
index 000000000..639103722
--- /dev/null
+++ b/pkg/exchange/util.go
@@ -0,0 +1,29 @@
+package exchange
+
+import "github.com/c9s/bbgo/pkg/types"
+
+func GetSessionAttributes(exchange types.Exchange) (isMargin, isFutures, isIsolated bool, isolatedSymbol string) {
+	if marginExchange, ok := exchange.(types.MarginExchange); ok {
+		marginSettings := marginExchange.GetMarginSettings()
+		isMargin = marginSettings.IsMargin
+		if isMargin {
+			isIsolated = marginSettings.IsIsolatedMargin
+			if marginSettings.IsIsolatedMargin {
+				isolatedSymbol = marginSettings.IsolatedMarginSymbol
+			}
+		}
+	}
+
+	if futuresExchange, ok := exchange.(types.FuturesExchange); ok {
+		futuresSettings := futuresExchange.GetFuturesSettings()
+		isFutures = futuresSettings.IsFutures
+		if isFutures {
+			isIsolated = futuresSettings.IsIsolatedFutures
+			if futuresSettings.IsIsolatedFutures {
+				isolatedSymbol = futuresSettings.IsolatedFuturesSymbol
+			}
+		}
+	}
+
+	return isMargin, isFutures, isIsolated, isolatedSymbol
+}
diff --git a/pkg/service/backtest.go b/pkg/service/backtest.go
index 256514fcf..7b43f8d03 100644
--- a/pkg/service/backtest.go
+++ b/pkg/service/backtest.go
@@ -13,6 +13,7 @@ import (
 	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 
+	exchange2 "github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -25,7 +26,7 @@ func (s *BacktestService) SyncKLineByInterval(ctx context.Context, exchange type
 	log.Infof("synchronizing %s klines with interval %s: %s <=> %s", exchange.Name(), interval, startTime, endTime)
 
 	// TODO: use isFutures here
-	_, _, isIsolated, isolatedSymbol := getExchangeAttributes(exchange)
+	_, _, isIsolated, isolatedSymbol := exchange2.GetSessionAttributes(exchange)
 	// override symbol if isolatedSymbol is not empty
 	if isIsolated && len(isolatedSymbol) > 0 {
 		symbol = isolatedSymbol
diff --git a/pkg/service/deposit.go b/pkg/service/deposit.go
index b892cdb81..6b49cce13 100644
--- a/pkg/service/deposit.go
+++ b/pkg/service/deposit.go
@@ -7,6 +7,7 @@ import (
 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
 
+	"github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -17,7 +18,7 @@ type DepositService struct {
 
 // Sync syncs the withdraw records into db
 func (s *DepositService) Sync(ctx context.Context, ex types.Exchange, startTime time.Time) error {
-	isMargin, isFutures, isIsolated, _ := getExchangeAttributes(ex)
+	isMargin, isFutures, isIsolated, _ := exchange.GetSessionAttributes(ex)
 	if isMargin || isFutures || isIsolated {
 		// only works in spot
 		return nil
diff --git a/pkg/service/order.go b/pkg/service/order.go
index 4780bfc0d..8cdff47ec 100644
--- a/pkg/service/order.go
+++ b/pkg/service/order.go
@@ -10,6 +10,7 @@ import (
 	"github.com/jmoiron/sqlx"
 	log "github.com/sirupsen/logrus"
 
+	exchange2 "github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -19,7 +20,7 @@ type OrderService struct {
 }
 
 func (s *OrderService) Sync(ctx context.Context, exchange types.Exchange, symbol string, startTime time.Time) error {
-	isMargin, isFutures, isIsolated, isolatedSymbol := getExchangeAttributes(exchange)
+	isMargin, isFutures, isIsolated, isolatedSymbol := exchange2.GetSessionAttributes(exchange)
 	// override symbol if isolatedSymbol is not empty
 	if isIsolated && len(isolatedSymbol) > 0 {
 		symbol = isolatedSymbol
diff --git a/pkg/service/reward.go b/pkg/service/reward.go
index ef28f0ef8..bf657a601 100644
--- a/pkg/service/reward.go
+++ b/pkg/service/reward.go
@@ -10,6 +10,7 @@ import (
 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
 
+	exchange2 "github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/fixedpoint"
 	"github.com/c9s/bbgo/pkg/types"
@@ -29,7 +30,7 @@ func (s *RewardService) Sync(ctx context.Context, exchange types.Exchange, start
 		return ErrExchangeRewardServiceNotImplemented
 	}
 
-	isMargin, isFutures, _, _ := getExchangeAttributes(exchange)
+	isMargin, isFutures, _, _ := exchange2.GetSessionAttributes(exchange)
 	if isMargin || isFutures {
 		return nil
 	}
diff --git a/pkg/service/trade.go b/pkg/service/trade.go
index cc7e1480e..ae8379fa0 100644
--- a/pkg/service/trade.go
+++ b/pkg/service/trade.go
@@ -11,6 +11,7 @@ import (
 	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 
+	exchange2 "github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -53,7 +54,7 @@ func NewTradeService(db *sqlx.DB) *TradeService {
 }
 
 func (s *TradeService) Sync(ctx context.Context, exchange types.Exchange, symbol string, startTime time.Time) error {
-	isMargin, isFutures, isIsolated, isolatedSymbol := getExchangeAttributes(exchange)
+	isMargin, isFutures, isIsolated, isolatedSymbol := exchange2.GetSessionAttributes(exchange)
 	// override symbol if isolatedSymbol is not empty
 	if isIsolated && len(isolatedSymbol) > 0 {
 		symbol = isolatedSymbol
@@ -412,28 +413,3 @@ func SelectLastTrades(ex types.ExchangeName, symbol string, isMargin, isFutures,
 		Limit(limit)
 }
 
-func getExchangeAttributes(exchange types.Exchange) (isMargin, isFutures, isIsolated bool, isolatedSymbol string) {
-	if marginExchange, ok := exchange.(types.MarginExchange); ok {
-		marginSettings := marginExchange.GetMarginSettings()
-		isMargin = marginSettings.IsMargin
-		if isMargin {
-			isIsolated = marginSettings.IsIsolatedMargin
-			if marginSettings.IsIsolatedMargin {
-				isolatedSymbol = marginSettings.IsolatedMarginSymbol
-			}
-		}
-	}
-
-	if futuresExchange, ok := exchange.(types.FuturesExchange); ok {
-		futuresSettings := futuresExchange.GetFuturesSettings()
-		isFutures = futuresSettings.IsFutures
-		if isFutures {
-			isIsolated = futuresSettings.IsIsolatedFutures
-			if futuresSettings.IsIsolatedFutures {
-				isolatedSymbol = futuresSettings.IsolatedFuturesSymbol
-			}
-		}
-	}
-
-	return isMargin, isFutures, isIsolated, isolatedSymbol
-}
diff --git a/pkg/service/withdraw.go b/pkg/service/withdraw.go
index af0a0df83..f8448d0e0 100644
--- a/pkg/service/withdraw.go
+++ b/pkg/service/withdraw.go
@@ -7,6 +7,7 @@ import (
 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
 
+	"github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -17,7 +18,7 @@ type WithdrawService struct {
 
 // Sync syncs the withdrawal records into db
 func (s *WithdrawService) Sync(ctx context.Context, ex types.Exchange, startTime time.Time) error {
-	isMargin, isFutures, isIsolated, _ := getExchangeAttributes(ex)
+	isMargin, isFutures, isIsolated, _ := exchange.GetSessionAttributes(ex)
 	if isMargin || isFutures || isIsolated {
 		// only works in spot
 		return nil