Break through the puzzle of high-level behavioral finance and use standardized tools to conquer the inner demons of derivatives gaming! This article provides in-depth science on the "winner's curse" and overconfidence caused by continuous profits in Contracts for Difference (CFD) trading, the bad habit of taking orders by chance due to instinctive loss aversion, and deconstructs the sunk cost fallacy of being obsessed with early investment and missing the opportunity to leave the market. Describes in detail how to use trailing stop loss, limit strategy and untampered historical retracement and order data to cut off emotional interference.