Merge pull request #300 from alpacahq/add_trail_to_replace_order

Add support for replacing a trailing_stop order

Author: Shlomi Kushchi

alpaca_trade_api/rest.py

@@ -333,6 +333,7 @@ def replace_order(
             qty: str = None,
             limit_price: str = None,
             stop_price: str = None,
+            trail: str = None,
             time_in_force: str = None,
             client_order_id: str = None
     ) -> Order:
@@ -341,7 +342,12 @@ def replace_order(
         :param qty: str of int
         :param limit_price: str of float
         :param stop_price: str of float
+        :param trail: str of float, represents trailing_price or
+               trailing_percent. determined by the original order.
         :param time_in_force: day, gtc, opg, cls, ioc, fok
+
+        note: you cannot replace type of order. so, it was trailing_stop(e.g)
+              it will remain trailing_stop.
         """
         params = {}
         if qty is not None:
@@ -350,6 +356,8 @@ def replace_order(
             params['limit_price'] = FLOAT(limit_price)
         if stop_price is not None:
             params['stop_price'] = FLOAT(stop_price)
+        if trail is not None:
+            params['trail'] = FLOAT(trail)
         if time_in_force is not None:
             params['time_in_force'] = time_in_force
         if client_order_id is not None:

tests/test_rest.py

@@ -102,6 +102,9 @@ def test_orders(reqmock):
     "filled_at": "2018-03-09T19:05:27Z",
     "failed_at": "2018-03-09T19:05:27Z",
     "filled_qty": "0",
+    "hwm": null,
+    "trail_percent": null,
+    "trail_price": null,
     "failured_reason": "string",
     "cancel_requested_at": "2018-03-09T19:05:27Z",
     "submitted_at": "2018-03-09T19:05:27Z"
@@ -133,6 +136,9 @@ def test_orders(reqmock):
   "filled_at": "2018-03-09T19:05:27Z",
   "failed_at": "2018-03-09T19:05:27Z",
   "filled_qty": "0",
+  "hwm": null,
+  "trail_percent": null,
+  "trail_price": null,
   "failured_reason": "string",
   "cancel_requested_at": "2018-03-09T19:05:27Z",
   "submitted_at": "2018-03-09T19:05:27Z"
@@ -218,6 +224,9 @@ def test_orders(reqmock):
   "filled_at": "2018-03-09T05:50:50Z",
   "failed_at": "2018-03-09T05:50:50Z",
   "filled_qty": "0",
+  "hwm": null,
+  "trail_percent": null,
+  "trail_price": null,
   "failured_reason": "string",
   "cancel_requested_at": "2018-03-09T05:50:50Z",
   "submitted_at": "2018-03-09T05:50:50Z"
@@ -249,6 +258,9 @@ def test_orders(reqmock):
   "filled_at": "2018-03-09T05:50:50Z",
   "failed_at": "2018-03-09T05:50:50Z",
   "filled_qty": "0",
+  "hwm": null,
+  "trail_percent": null,
+  "trail_price": null,
   "failured_reason": "string",
   "cancel_requested_at": "2018-03-09T05:50:50Z",
   "submitted_at": "2018-03-09T05:50:50Z"