No one likes to think about the worst-case scenario, or to make a detailed plan to recover should it happen. It's just one strategy for learning how to trade in a relaxed but focused way so that, should you ever face a severe financial setback, you can recover from it. Trading requires intense concentration and focus, and it's difficult to maintain this posture when the pressure is on you to perform. Therefore, you have to do whatever you can to minimize any expected or even unexpected psychological pressure.

The most obvious way to relieve such pressure is to think in terms of probabilities and carefully manage risk. By that I mean avoid overtrading, fast markets, exceptional tick size