modified: tigeropen/trade/response/order_preview_response.py

	modified:   tigeropen/trade/trade_client.py

Author: tigersk

tigeropen/trade/response/order_preview_response.py

@@ -5,7 +5,8 @@
                                "maintMargin": "maint_margin", "equityWithLoan": "equity_with_loan",
                                "minCommission": "min_commission", "maintMarginBefore": "maint_margin_before",
                                "initMargin": "init_margin", "equityWithLoanBefore": "equity_with_loan_before",
-                               "marginCurrency": "margin_currency", "maxCommission": "max_commission"}
+                               "marginCurrency": "margin_currency", "maxCommission": "max_commission",
+                               "warningText": "warning_text"}
 
 
 class PreviewOrderResponse(TigerResponse):

tigeropen/trade/trade_client.py

@@ -428,6 +428,9 @@ def preview_order(self, order):
             min_commission          预期最低佣金
             max_commission          预期最高佣金
             commission_currency     佣金货币币种
+
+            若无法下单, 返回的 dict 中仅有如下字段:
+            warning_text            无法下单的原因
         """
         params = PlaceModifyOrderParams()
         params.account = order.account