Update documentation

README.md

@@ -104,17 +104,35 @@ You can access the following information through this object.
 ### REST.get_account()
 Calls `GET /account` and returns an `Account` entity.
 
-### REST.list_orders(status=None, limit=None, after=None, until=None, direction=None)
+### REST.list_orders(status=None, limit=None, after=None, until=None, direction=None, nested=None)
 Calls `GET /orders` and returns a list of `Order` entities.
 `after` and `until` need to be string format, which you can obtain by `pd.Timestamp().isoformat()`
 
-### REST.submit_order(symbol, qty, side, type, time_in_force, limit_price=None, stop_price=None, client_order_id=None)
+### REST.submit_order(symbol, qty, side, type, time_in_force, limit_price=None, stop_price=None, client_order_id=None, order_class=None, take_profit=None, stop_loss=None)
 Calls `POST /orders` and returns an `Order` entity.
 
-### REST.get_order_by_client_order_id(client_order_id)
+Below is an example of submitting a bracket orders.
+```py
+api.submit_order(
+    symbol='SPY',
+    side='buy',
+    type='market',
+    qty='100',
+    time_in_force='day',
+    take_profit=dict(
+        limit_price='305.0',
+    ),
+    stop_loss=dict(
+        stop_price=295.5,
+        limit_price=295.5,
+    )
+)
+```
+
+### REST.get_order_by_client_order_id(client_order_id, nested=None)
 Calls `GET /orders` with client_order_id and returns an `Order` entity.
 
-### REST.get_order(order_id)
+### REST.get_order(order_id, nested=None)
 Calls `GET /orders/{order_id}` and returns an `Order` entity.
 
 ### REST.cancel_order(order_id)