Penetrate the loss trap of behavioral finance and use rigid digital mechanisms to block the vicious transmission of emotional instructions! This article provides in-depth compliance and popular science on two classic trading psychological misunderstandings in Contracts for Difference (CFD) trading: "retaliatory trading in a hurry to recover losses" and "overconfidence in blindly lifting stop losses after making profits". It explains in detail how to use the built-in guaranteed stop loss, margin warning and position limit tools to set up external sobriety guardrails for operations, and details how an intelligent follow-up system that integrates untampered historical maximum drawdown assessment and independent risk control parameters can help traders desensitize subjective emotions.