How do I do this with ES, I'm stumped. I don't see the OPG option anywhere. What if I do this with low liquid futures like NQ. And price is 2500 versus 2502, Midpoint is 2501 and how do I go to limit of 2501 which is the midpoint? So the goal is a limit order of the market price. What is "market price" in IB, is it midpoint or last traded price?