📖William Gann
Multidisciplinary Thinking
Use insights from multiple disciplines for better decisions.
Draw insights from multiple disciplines — psychology, history, mathematics, and science — to build a lattice of mental models for better investment decisions.
🏠 Everyday Analogy
📖 Core Interpretation
W.D. Gann highlights that many investment mistakes are psychological, not analytical. Managing behavior under stress is as important as finding ideas.
💎 Key Insight：Cross-disciplinary thinking reveals patterns invisible to specialists.
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❓ Why It Matters
In volatile markets, fear and greed push investors to buy high and sell low. A behavioral framework reduces avoidable, self-inflicted errors.
🎯 How to Practice
Pre-write decision rules, slow down trades during stress, and separate market emotion from business facts before adjusting positions.
⚠️ Common Pitfalls
Following crowd emotion at extremes
Mistaking confidence for certainty
Forcing trades to quickly recover losses
📚 Case Studies
1
Crash of 1983—87 Bull Market Reversal (1987)
An investor rides the strong 1980s bull market, but unlike peers, applies Gann’s rules: pyramids cautiously, sets stops, and watches time and price cycles.
✨ Outcome：Capital mostly preserved in October 1987 crash; limited drawdowns and quick recovery enabled by disciplined exits.
2
Pre-Crash Distribution Pattern (1929)
Gann observes repeated geometric and cyclical signals of exhaustion in leading industrials before the 1929 crash, aligning with his natural law timing cycles and price angles.
✨ Outcome：Reduces long exposure and initiates short positions, profiting significantly as the market collapses into 1932.
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