Hello, gif:

There are many reasons why a Generation1 AutoTrade Software program might fill later than your system. Remember that Gen1 software is not made by C2, and that it runs on individual people's computers, which means that it suffers from the vagaries of weird firewalls, sporadic internet connectivity, improperly configured Interactive Brokers TWS apps, etc. (In contrast, Gen3 software is run as a service on centralized servers.)

Now, we do indeed display the fills received by Gen1 traders -- even late fills -- but C2 software is smart enough to ignore these "late" fills when calculating your system's VWAP hypothetical fill price.

In other words, don't fret. Your fill price is not affected by late Gen1 AutoTrade fills. Those fills are displayed purely for the sake of full user transparency, and for regulatory reasons.

Matthew