[Add]stop_supported member data of ContractData object

vnpy/gateway/bitmex/bitmex_gateway.py

@@ -606,6 +606,7 @@ class BitmexWebsocketApi(WebsocketClient):
             product=Product.FUTURES,
             pricetick=d["tickSize"],
             size=d["lotSize"],
+            stop_supported=True,
             gateway_name=self.gateway_name,
         )
 

vnpy/trader/object.py

@@ -233,6 +233,8 @@ class ContractData(BaseData):
     size: int
     pricetick: float
 
+    stop_supported: bool = False    # whether server supports stop order
+
     option_strike: float = 0
     option_underlying: str = ""     # vt_symbol of underlying contract
     option_type: OptionType = None