I am trying to get a better understanding on the priority of option orders (both pit and electronic). I mainly trade vertical spreads and when I trade SPX (pit traded) I routinely have to cancel a limit order that is at the natural and resubmit it because the guy in the pit isnât looking at the order I placed 30 minutes ago. A few months ago I remember reading a thread on ET about option order execution but am unable to find it. Thanks