diff --git a/piker/ui/order_mode.py b/piker/ui/order_mode.py
index a3f01e9f..07f2b281 100644
--- a/piker/ui/order_mode.py
+++ b/piker/ui/order_mode.py
@@ -319,14 +319,10 @@ async def start_order_mode(
 ) -> None:
 
     # spawn EMS actor-service
-    async with open_ems(
-        brokername,
-        symbol,
-    ) as (book, trades_stream), open_order_mode(
-        symbol,
-        chart,
-        book,
-    ) as order_mode:
+    async with (
+        open_ems(brokername, symbol) as (book, trades_stream),
+        open_order_mode(symbol, chart, book) as order_mode
+    ):
 
         def get_index(time: float):