I have not placed a market order on the emini s&p in a couple of years. Always using limit orders and getting filled at the offer (if buying) and bid (if selling). Back then it seemed that they use to ding you .25 if you placed a market order vs. a limit. Is this still true? The reason I am asking is because my order execution system is off by about 2-3 minutes for some reason Patsystem/Refco, and a market order is the only way to go for now. thank you.