Yes, I agree, when they say stick to your strategy. There is always the simulator to experiment with refining or altering according to the way the market changes and if that works out well time after time, it can become a new strategy with real money. I was really surprised to find that the way the Think or Swim simulator fills and the action is just about the same as in RL. Fills are not at the mark as in the simulator but I haven't noticed much difference when it comes to scalping with market orders the way I am in RL. Even slippage seems the same. That simulator is so good, I wonder how it is coded to mirror the market with fills and the action. Do they mirror the market somehow for the simulator?