Of all the futures platforms out there, which one has a demo that most accurately represents realistic fills. Right now I'm using GSTrader through Global Futures, it seems sort of okay, but has major flaws. The strategy I'm running mostly captures one tick moves such that I can't accurately gauge its effectiveness without some semblance of a realistic fill. Obviously I need to test it live, but in the meantime I want the most accurate sim fill possible. Any suggestions?