update fetch_closed_orders

ccxt/async_support/mt5.py

@@ -714,14 +714,16 @@ class mt5(Exchange, ImplicitAPI):
         """异步获取已平仓订单 - 修复版本"""
         if not hasattr(self, 'token') or not self.token:
             await self.get_token()
-        yesterday = datetime.now() - timedelta(days=3)
-        from_day = yesterday.strftime('%Y-%m-%d') + 'T00:00:00'
-        tomorrow = datetime.now() + timedelta(days=1)
-        to_day = tomorrow.strftime('%Y-%m-%d') + 'T00:00:00'
+        
+        if params.get('from') is None or params.get('to') is None:
+            yesterday = datetime.now() - timedelta(days=3)
+            params['from'] = yesterday.strftime('%Y-%m-%d') + 'T00:00:00'
+            
+            tomorrow = datetime.now() + timedelta(days=1)
+            params['to'] = tomorrow.strftime('%Y-%m-%d') + 'T00:00:00'
+        
         request = {
             'id': self.token,
-            'from': from_day,
-            'to': to_day,
             'sort': 'OpenTime',
             'ascending': 'true',
         }