diff --git a/bbgo/types/kline.go b/bbgo/types/kline.go
index 8316baa02..0d133f5e7 100644
--- a/bbgo/types/kline.go
+++ b/bbgo/types/kline.go
@@ -45,6 +45,7 @@ type KLine struct {
 	Open        string `json:"o"`
 	Close       string `json:"c"`
 	High        string `json:"h"`
+
 	Low         string `json:"l"`
 	Volume      string `json:"V"` // taker buy base asset volume (like 10 BTC)
 	QuoteVolume string `json:"Q"` // taker buy quote asset volume (like 1000USDT)