BUG: Need to set portfolio_needs_update on the algorithm

not on the simulator

zipline/gens/tradesimulation.py

@@ -195,7 +195,7 @@ class AlgorithmSimulator(object):
                                     )
                                 self.algo.perf_tracker.handle_intraday_close()
 
-                    self.portfolio_needs_update = True
+                    self.algo.portfolio_needs_update = True
 
             risk_message = self.algo.perf_tracker.handle_simulation_end()
             yield risk_message