diff --git a/x10/perpetual/trading_client/account_module.py b/x10/perpetual/trading_client/account_module.py
index 93d8bfa..29d0bde 100644
--- a/x10/perpetual/trading_client/account_module.py
+++ b/x10/perpetual/trading_client/account_module.py
@@ -127,7 +127,7 @@ async def get_order_by_external_id(self, external_id: str) -> WrappedApiResponse
 
     async def get_trades(
         self,
-        market_names: List[str],
+        market_names: List[str] = None,
         trade_side: Optional[OrderSide] = None,
         trade_type: Optional[TradeType] = None,
         cursor: Optional[int] = None,