Attempt to handle existing order updates with ib backend

piker/brokers/ib.py

@@ -440,11 +440,19 @@ class Client:
     # async to be consistent for the client proxy, and cuz why not.
     async def submit_limit(
         self,
-        oid: str,  # XXX: see return value
+        # ignored since ib doesn't support defining your
+        # own order id
+        oid: str,
         symbol: str,
         price: float,
         action: str,
         size: int,
+
+        # XXX: by default 0 tells ``ib_insync`` methods that there is no
+        # existing order so ask the client to create a new one (which 
+        # it seems to do by allocating an int counter - collision
+        # prone..)
+        brid: int = None,
     ) -> int:
         """Place an order and return integer request id provided by client.
 
@@ -460,7 +468,7 @@ class Client:
         trade = self.ib.placeOrder(
             contract,
             Order(
-                # orderId=oid,  # stupid api devs..
+                orderId=brid or 0,  # stupid api devs..
                 action=action.upper(),  # BUY/SELL
                 orderType='LMT',
                 lmtPrice=price,
@@ -1226,6 +1234,9 @@ async def stream_trades(
             # it's a trade event generated by TWS usage.
             log.warning(f"TWS triggered trade:\n{pformat(msg)}")
 
-            msg['reqid'] = 'tws-' + msg['reqid']
+            msg['reqid'] = 'tws-' + str(-1 * msg['reqid'])
+
+            yield {'remote_trades': (event_name, msg)}
+            continue
 
         yield {'local_trades': (event_name, msg)}