diff --git a/piker/brokers/ib/feed.py b/piker/brokers/ib/feed.py
index 28054da4..69450f82 100644
--- a/piker/brokers/ib/feed.py
+++ b/piker/brokers/ib/feed.py
@@ -69,9 +69,9 @@ from .api import (
     Contract,
     RequestError,
 )
+from .venues import is_venue_open
 from ._util import (
     data_reset_hack,
-    is_current_time_in_range,
 )
 from .symbols import get_mkt_info
 
@@ -203,7 +203,8 @@ async def open_history_client(
             latency = time.time() - query_start
             if (
                 not timedout
-                # and latency <= max_timeout
+                # and
+                # latency <= max_timeout
             ):
                 count += 1
                 mean += latency / count
@@ -219,8 +220,10 @@ async def open_history_client(
                 )
                 if (
                     end_dt
-                    and head_dt
-                    and end_dt <= head_dt
+                    and
+                    head_dt
+                    and
+                    end_dt <= head_dt
                 ):
                     raise DataUnavailable(
                         f'First timestamp is {head_dt}\n'
@@ -278,7 +281,7 @@ async def open_history_client(
                     start_dt
                 ):
                     # TODO! rm this once we're more confident it never hits!
-                    breakpoint()
+                    # breakpoint()
                     raise RuntimeError(
                         f'OHLC-bars array start is gt `start_dt` limit !!\n'
                         f'start_dt: {start_dt}\n'
@@ -298,7 +301,7 @@ async def open_history_client(
         # TODO: it seems like we can do async queries for ohlc
         # but getting the order right still isn't working and I'm not
         # quite sure why.. needs some tinkering and probably
-        # a lookthrough of the ``ib_insync`` machinery, for eg. maybe
+        # a lookthrough of the `ib_insync` machinery, for eg. maybe
         # we have to do the batch queries on the `asyncio` side?
         yield (
             get_hist,
@@ -421,14 +424,13 @@ _failed_resets: int = 0
 
 
 async def get_bars(
-
     proxy: MethodProxy,
     fqme: str,
     timeframe: int,
 
     # blank to start which tells ib to look up the latest datum
-    end_dt: str = '',
-    start_dt: str|None = '',
+    end_dt: datetime|None = None,
+    start_dt: datetime|None = None,
 
     # TODO: make this more dynamic based on measured frame rx latency?
     # how long before we trigger a feed reset (seconds)
@@ -482,7 +484,8 @@ async def get_bars(
                     dt_duration,
                 ) = await proxy.bars(
                     fqme=fqme,
-                    # XXX TODO! lol we're not using this..
+                    # XXX TODO! LOL we're not using this and IB dun
+                    # support it anyway..
                     # start_dt=start_dt,
                     end_dt=end_dt,
                     sample_period_s=timeframe,
@@ -734,7 +737,7 @@ async def _setup_quote_stream(
         # '294',  # Trade rate / minute
         # '295',  # Vlm rate / minute
     ),
-    contract: Contract | None = None,
+    contract: Contract|None = None,
 
 ) -> trio.abc.ReceiveChannel:
     '''
@@ -756,7 +759,12 @@ async def _setup_quote_stream(
         # XXX since this is an `asyncio.Task`, we must use
         # tractor.pause_from_sync()
 
-        caccount_name, client = get_preferred_data_client(accts2clients)
+        (
+            _account_name,
+            client,
+        ) = get_preferred_data_client(
+            accts2clients,
+        )
         contract = (
             contract
             or
@@ -1091,14 +1099,9 @@ async def stream_quotes(
         )
 
         # is venue active rn?
-        venue_is_open: bool = any(
-            is_current_time_in_range(
-                start_dt=sesh.start,
-                end_dt=sesh.end,
-            )
-            for sesh in details.tradingSessions()
+        venue_is_open: bool = is_venue_open(
+            con_deats=details,
         )
-
         init_msg = FeedInit(mkt_info=mkt)
 
         # NOTE, tell sampler (via config) to skip vlm summing for dst