diff --git a/exchange/bitget_trade.go b/exchange/bitget_trade.go
index aeb08f9..3810e96 100644
--- a/exchange/bitget_trade.go
+++ b/exchange/bitget_trade.go
@@ -30,7 +30,7 @@ func NewBitgetTrade(apiKey, apiSecret, passphrase string) *BitgetTrade {
 	}
 }
 
-func (b *BitgetTrade) PlaceMarketOrder(side, symbol, size, tradeSide string) (string, error) {
+func (b *BitgetTrade) PlaceMarketOrder(side, symbol, size, tradeSide, holdSide string) (string, error) {
 	ts := fmt.Sprintf("%d", time.Now().UnixMilli())
 	method := "POST"
 
@@ -48,6 +48,10 @@ func (b *BitgetTrade) PlaceMarketOrder(side, symbol, size, tradeSide string) (st
 		"tradeSide":   tradeSide,
 		"size":        size,
 	}
+	// When closing, Bitget requires holdSide to identify which position to close
+	if tradeSide == "close" && holdSide != "" {
+		body["holdSide"] = holdSide
+	}
 	bodyJSON, _ := json.Marshal(body)
 
 	sign := b.sign(method, requestPath, ts, string(bodyJSON))
diff --git a/trader.go b/trader.go
index fa7030b..4596418 100644
--- a/trader.go
+++ b/trader.go
@@ -1168,7 +1168,7 @@ func (t *Trader) placeOrder(leg *PositionLeg, side string, store *PriceStore) (s
 	if leg.Exchange == ExBitget {
 		szStr := exchange.GetBitgetSize(leg.Coin+"USDT", t.cfg.TradeAmountUSD, leg.EntryPrice)
 		log.Printf("[Order] BG %s %s | amountUSD=%.2f entryPrice=%.6f size=%s", side, leg.Coin+"USDT", t.cfg.TradeAmountUSD, leg.EntryPrice, szStr)
-		oid, err := t.bitget.PlaceMarketOrder(side, leg.Coin+"USDT", szStr, "open")
+		oid, err := t.bitget.PlaceMarketOrder(side, leg.Coin+"USDT", szStr, "open", "")
 		if err != nil {
 			return fmt.Sprintf("BG %s error: %v", side, err), 0
 		}
@@ -1398,7 +1398,11 @@ func (t *Trader) closeLeg(leg *PositionLeg) string {
 
 	if leg.Exchange == ExBitget {
 		log.Printf("[Order] BG close %s %s | size=%s", side, leg.Coin+"USDT", leg.Size)
-		resp, err := t.bitget.PlaceMarketOrder(side, leg.Coin+"USDT", leg.Size, "close")
+		holdSide := "long"
+		if leg.Side == Short {
+			holdSide = "short"
+		}
+		resp, err := t.bitget.PlaceMarketOrder(side, leg.Coin+"USDT", leg.Size, "close", holdSide)
 		if err != nil {
 			return fmt.Sprintf("%v", err)
 		}
@@ -1584,7 +1588,7 @@ func (t *Trader) placeOrderAt(leg *PositionLeg, side string, store *PriceStore,
 	if leg.Exchange == ExBitget {
 		szStr := exchange.GetBitgetSize(leg.Coin+"USDT", t.cfg.TradeAmountUSD, price)
 		log.Printf("[Order] BG scale %s %s | amountUSD=%.2f price=%.6f size=%s", side, leg.Coin+"USDT", t.cfg.TradeAmountUSD, price, szStr)
-		_, err := t.bitget.PlaceMarketOrder(side, leg.Coin+"USDT", szStr, "open")
+		_, err := t.bitget.PlaceMarketOrder(side, leg.Coin+"USDT", szStr, "open", "")
 		if err != nil {
 			return fmt.Sprintf("BG %s error: %v", side, err)
 		}