These are 3 Margin of Safety principles distilled from William Gann's writing and public remarks. Use them as a decision checkpoint: translate each rule into a yes/no test, write what evidence would change your mind, and set a review date before you act. When a rule feels vague, open the full principle page and capture the driver you can verify (cash flows, leverage, incentives, competitive edge). This is educational, not investment advice—double-check primary sources and fit every rule to your time horizon, risk budget, and constraints.
"The market exists to serve you, not to guide you. Use market prices to your advantage — buy when the market offers bargains and sell when it offers premiums."
Use the market as your servant, not your guide.
Read Full Analysis →"Markets move in cycles driven by human emotion. Understanding where you are in the cycle helps you prepare for what comes next and position accordingly."
Understand where you are in the market cycle.
Read Full Analysis →"In the short run, the market is a voting machine; in the long run, it's a weighing machine. Prices can diverge wildly from value, but eventually converge."
Prices diverge from value short-term but converge long-term.
Read Full Analysis →Use this page as a workflow, not a collection of quotes. Pick 3–5 principles, translate each into a concrete check, and review your decisions on a fixed cadence. These are educational guardrails—always verify facts and match them to your own constraints.
Rehearse a scenario decision → ·Run a weekly toolkit → ·Browse all principles →
He is considered one of the most influential figures in the history of technical analysis. He believed that market movements followed natural laws and geometric patterns that could be predicted through careful study of price, time, and pattern relationships.
William Gann has 3 key principles on margin of safety. The most important one is "Market as Your Servant" — The market exists to serve you, not to guide you.
William Gann applies margin of safety through several key principles including "Market as Your Servant" and "Market Cycles Awareness". These principles guide practical investment decisions and have been tested across decades of market cycles.
William Gann's approach to margin of safety is distinguished by a focus on long-term thinking and fundamental analysis. With 3 specific principles in this area, William Gann provides a comprehensive framework that investors at any level can study and apply to improve their decision-making.
Treat each principle as a hypothesis. Write the evidence you would need, collect it from primary sources when possible (filings, letters, transcripts), and note what would invalidate the conclusion. If you can’t define inputs and triggers, you’re not applying the rule—you’re quoting it.
Pick a cadence you can sustain (weekly or monthly) and review process signals first: whether you followed your checklist, respected your boundaries, and documented assumptions. Only then look at outcomes. The goal is fewer low-quality decisions, not perfect prediction.
