diff --git a/piker/data/__init__.py b/piker/data/__init__.py
index b9c09e1c..49b0acb9 100644
--- a/piker/data/__init__.py
+++ b/piker/data/__init__.py
@@ -91,7 +91,7 @@ async def maybe_spawn_brokerd(
 
     # XXX: you should pretty much never want debug mode
     # for data daemons when running in production.
-    debug_mode: bool = False,
+    debug_mode: bool = True,
 ) -> tractor._portal.Portal:
     """If no ``brokerd.{brokername}`` daemon-actor can be found,
     spawn one in a local subactor and return a portal to it.
@@ -115,7 +115,7 @@ async def maybe_spawn_brokerd(
             tractor_kwargs = getattr(brokermod, '_spawn_kwargs', {})
 
             async with tractor.open_nursery(
-                debug_mode=False,
+                #debug_mode=debug_mode,
             ) as nursery:
                 try:
                     # spawn new daemon
@@ -244,7 +244,7 @@ async def open_feed(
         loglevel=loglevel,
 
         # TODO: add a cli flag for this
-        debug_mode=False,
+        # debug_mode=False,
 
     ) as portal:
 
diff --git a/piker/ui/_chart.py b/piker/ui/_chart.py
index 950ed010..d62fef5b 100644
--- a/piker/ui/_chart.py
+++ b/piker/ui/_chart.py
@@ -408,7 +408,7 @@ class ChartPlotWidget(pg.PlotWidget):
         self.name = name
         self._lc = linked_charts
 
-        # view-local placeholder for book graphics
+        # scene-local placeholder for book graphics
         # sizing to avoid overlap with data contents
         self._max_l1_line_len: float = 0
 
@@ -448,7 +448,7 @@ class ChartPlotWidget(pg.PlotWidget):
         # for when the splitter(s) are resized
         self._vb.sigResized.connect(self._set_yrange)
 
-    def last_bar_in_view(self) -> bool:
+    def last_bar_in_view(self) -> int:
         self._ohlc[-1]['index']
 
     def update_contents_labels(
diff --git a/piker/ui/order_mode.py b/piker/ui/order_mode.py
index c36474e7..84806156 100644
--- a/piker/ui/order_mode.py
+++ b/piker/ui/order_mode.py
@@ -181,10 +181,13 @@ class OrderMode:
         log.runtime(result)
 
     def on_cancel(self, uuid: str) -> None:
+
         msg = self.book._sent_orders.pop(uuid, None)
+
         if msg is not None:
             self.lines.remove_line(uuid=uuid)
             self.chart._cursor.show_xhair()
+
         else:
             log.warning(
                 f'Received cancel for unsubmitted order {pformat(msg)}'