Can anyone explain why 100 shares a highly liquid stock would fail to fill and execute a cascading sabotage effect on the entire algorithm? I trust it's something I'm overlooking, but I just don't know what that might be. Any help would be greatly appreciated. I know that I trade stocks like this all day in ScottradeElite and never have any fill issues with my hot keys. I'm starting to think this slippage deal is total nonsense, because all my orders get filled in real life, and I have never had to wait minutes, much less an entire day to have an order closed or filled. It just doesn't happen period.