diff --git a/pkg/backtest/exchange.go b/pkg/backtest/exchange.go
index 851c4df14..28a6b49a4 100644
--- a/pkg/backtest/exchange.go
+++ b/pkg/backtest/exchange.go
@@ -382,6 +382,14 @@ func (e *Exchange) SubscribeMarketData(
 	}
 
 	log.Infof("querying klines from database with exchange: %v symbols: %v and intervals: %v for back-testing", e.Name(), symbols, intervals)
+	if len(symbols) == 0 {
+		log.Warnf("empty symbols, will not query kline data from the database")
+
+		c := make(chan types.KLine)
+		close(c)
+		return c, nil
+	}
+
 	klineC, errC := e.srv.QueryKLinesCh(startTime, endTime, e, symbols, intervals)
 	go func() {
 		if err := <-errC; err != nil {
diff --git a/pkg/cmd/backtest.go b/pkg/cmd/backtest.go
index 7ed612ee3..979412e9b 100644
--- a/pkg/cmd/backtest.go
+++ b/pkg/cmd/backtest.go
@@ -528,6 +528,11 @@ var BacktestCmd = &cobra.Command{
 
 		for _, session := range environ.Sessions() {
 			for symbol, trades := range session.Trades {
+				if len(trades.Trades) == 0 {
+					log.Warnf("session has no %s trades", symbol)
+					continue
+				}
+
 				tradeState := sessionTradeStats[session.Name][symbol]
 				profitFactor := tradeState.ProfitFactor
 				winningRatio := tradeState.WinningRatio
@@ -598,8 +603,11 @@ var BacktestCmd = &cobra.Command{
 	},
 }
 
-func createSymbolReport(userConfig *bbgo.Config, session *bbgo.ExchangeSession, symbol string, trades []types.Trade, intervalProfit *types.IntervalProfitCollector,
-	profitFactor, winningRatio fixedpoint.Value) (
+func createSymbolReport(
+	userConfig *bbgo.Config, session *bbgo.ExchangeSession, symbol string, trades []types.Trade,
+	intervalProfit *types.IntervalProfitCollector,
+	profitFactor, winningRatio fixedpoint.Value,
+) (
 	*backtest.SessionSymbolReport,
 	error,
 ) {
@@ -669,7 +677,10 @@ func createSymbolReport(userConfig *bbgo.Config, session *bbgo.ExchangeSession,
 	return &symbolReport, nil
 }
 
-func verify(userConfig *bbgo.Config, backtestService *service.BacktestService, sourceExchanges map[types.ExchangeName]types.Exchange, startTime, endTime time.Time) error {
+func verify(
+	userConfig *bbgo.Config, backtestService *service.BacktestService,
+	sourceExchanges map[types.ExchangeName]types.Exchange, startTime, endTime time.Time,
+) error {
 	for _, sourceExchange := range sourceExchanges {
 		err := backtestService.Verify(sourceExchange, userConfig.Backtest.Symbols, startTime, endTime)
 		if err != nil {
@@ -709,7 +720,10 @@ func getExchangeIntervals(ex types.Exchange) types.IntervalMap {
 	return types.SupportedIntervals
 }
 
-func sync(ctx context.Context, userConfig *bbgo.Config, backtestService *service.BacktestService, sourceExchanges map[types.ExchangeName]types.Exchange, syncFrom, syncTo time.Time) error {
+func sync(
+	ctx context.Context, userConfig *bbgo.Config, backtestService *service.BacktestService,
+	sourceExchanges map[types.ExchangeName]types.Exchange, syncFrom, syncTo time.Time,
+) error {
 	for _, symbol := range userConfig.Backtest.Symbols {
 		for _, sourceExchange := range sourceExchanges {
 			var supportIntervals = getExchangeIntervals(sourceExchange)