📖William Gann
Continuous Improvement System
Treat investing as a craft that can always improve.
Review every investment decision — wins and losses — to improve your system. The best investors treat investing as a craft that can always be refined.
🏠 Everyday Analogy
📖 Core Interpretation
W.D. Gann treats survival as the first objective. Limiting permanent capital loss, controlling leverage, and avoiding single-point failure are prerequisites for long-term compounding.
💎 Key Insight：Post-mortem analysis drives systematic improvement.
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❓ Why It Matters
A single large drawdown can erase years of progress. Risk control is not timidity; it is the operating system that keeps compounding alive.
🎯 How to Practice
Define downside scenarios before entry, cap position size, avoid fragile leverage, and maintain liquidity so mistakes remain survivable.
⚠️ Common Pitfalls
Equating volatility with all forms of risk
Oversized positions without an exit plan
Using leverage to compensate for uncertainty
📚 Case Studies
1
Railroad Stock Forecast (1909)
Gann reportedly applied Gann Angles to predict turning points in several railroad stocks, including Union Pacific, correctly forecasting price reversals based on angle support and resistance from key swing lows.
✨ Outcome：Executed multiple short-term trades with favorable risk-reward, compounding returns over several months.
2
Black Monday Crash Setup (1987)
An analyst applied the Square of Nine to the S&P 500, noting geometric resistance and time cycles converging in late summer 1987, warning of a sharp correction before Black Monday.
✨ Outcome：Exited index positions in advance and re-entered gradually after the crash at lower prices.
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