diff --git a/pkg/backtest/exchange.go b/pkg/backtest/exchange.go
index bdcc8c242..d7e2c60ad 100644
--- a/pkg/backtest/exchange.go
+++ b/pkg/backtest/exchange.go
@@ -33,6 +33,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/c9s/bbgo/pkg/exchange/ftx"
+	"github.com/c9s/bbgo/pkg/exchange/okex"
 	"github.com/pkg/errors"
 
 	"github.com/c9s/bbgo/pkg/bbgo"
@@ -313,6 +315,10 @@ func newPublicExchange(sourceExchange types.ExchangeName) (types.Exchange, error
 		return binance.New("", ""), nil
 	case types.ExchangeMax:
 		return max.New("", ""), nil
+	case types.ExchangeFTX:
+		return ftx.NewExchange("", "", ""), nil
+	case types.ExchangeOKEx:
+		return okex.New("", "", ""), nil
 	}
 
 	return nil, fmt.Errorf("exchange %s is not supported", sourceExchange)
diff --git a/pkg/exchange/okex/exchange.go b/pkg/exchange/okex/exchange.go
index cfa49056a..63626dfd1 100644
--- a/pkg/exchange/okex/exchange.go
+++ b/pkg/exchange/okex/exchange.go
@@ -28,7 +28,10 @@ type Exchange struct {
 
 func New(key, secret, passphrase string) *Exchange {
 	client := okexapi.NewClient()
-	client.Auth(key, secret, passphrase)
+
+	if len(key) > 0 && len(secret) > 0 {
+		client.Auth(key, secret, passphrase)
+	}
 
 	return &Exchange{
 		key:        key,