Overcome human weakness and reshape rational trading discipline! This article provides an in-depth analysis of fatal psychological traps such as "loss aversion", "retaliatory trading" and "FOMO" from the perspective of behavioral finance. It details how to use the position calculator and negative balance protection policy to block blind stud, and analyzes how the server-side stop-loss, stop-profit and trailing stop-loss functions can transform subjective emotions into objective instructions, helping investors establish a professional risk control mentality as calm as a lion hunting.