Break through the cognitive puzzle of behavioral finance and use data quantification mechanism to break the human trap that restricts long-term profits and losses! This article in-depth compliance science popularizes the logic of the "herd effect (herd mentality) triggering high-level takeovers" in the extreme market conditions of Contracts for Difference (CFD), which originates from the harm of self-interested attribution bias of "attributing profits to oneself and blaming external losses for losses." Detailed explanation on how to use market sentiment long and short position congestion index to avoid crowded trading ranges, and use standardized review ledger quantification templates to realize risk control decision-making in advance, and powerfully cut off the emotional loss cycle of "high pursuit, low kill".