The market can be crazy, but your principal must be safe! This article provides an in-depth analysis of the capital risk control and system redundancy design of financial derivatives transactions under extreme fluctuations. Popular science on how the negative balance protection policy can completely block the liquidation debt from the bottom, explores the dynamic stop-loss exit tool that combines the ATR indicator and market structure, and guides investors on how to use the asymmetric follow-up model and the single-day floating loss circuit breaker mechanism to prevent slippage risks and build an impregnable capital security defense line.