I try to get the most accurate results when I test my strategies and I barley ever back test. I forward test all my strategies using Market Replay from Ninja Trader at 500 speed (it works pretty well). I want to get even more accurate. I was wondering if there is a way to "simulate" competition for shares. I know in simulation mode if the shares are there it will grab them, but in real life someone else could have grabbed those shares before you. So anybody know of a way to simulate "competition" in forward testing?