I use MB trading. I also have a firewall at work and can only set orders before the market open at home. Unfortunately, there is no way to do this with market orders through MB. I can only use limit orders. I have a longer term holding period so a few cents doesn't really concern me. SO if at stock were trading at 20 with a few cents sread and I put in a limit buy order for say 30. I pick 30 so I know I'll get filled. My question is will I be hit at 30 or will I likely get filled similar to if I had entered a market order?