Dr. Van K. Tharp
USA
Added 04 Apr 2026
Investigation Summary
Dr. Van K. Tharp, founder of the Van Tharp Institute, transformed trading theory by shifting focus from "what to buy" (entries) to "how much to buy" (Position Sizing) and the statistical reliability of a system (Expectancy). He famously argued that position sizing and psychology account for roughly 90% of a trader's performance variability.
Expectancy: The System's Core Reliability
Expectancy represents the average amount you can expect to win (or lose) per dollar at risk over many trades.
Primary Resources & Books
The Definitive Guide to Position Sizing Strategies: Considered the authoritative text on money management and risk control.
Trade Your Way to Financial Freedom: Introduces the core concepts of expectancy and the "Holy Grail" myth (the idea that entries are the most important part of trading).
Van Tharp Institute Courses: Offers training in Peak Performance, System Development, and advanced position sizing.
Expectancy: The System's Core Reliability
Expectancy represents the average amount you can expect to win (or lose) per dollar at risk over many trades.
Primary Resources & Books
The Definitive Guide to Position Sizing Strategies: Considered the authoritative text on money management and risk control.
Trade Your Way to Financial Freedom: Introduces the core concepts of expectancy and the "Holy Grail" myth (the idea that entries are the most important part of trading).
Van Tharp Institute Courses: Offers training in Peak Performance, System Development, and advanced position sizing.
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Verification Disclaimer: The information on this page is the result of an independent investigation by Trading Integrity Bureau. While we strive for accuracy, our verification is based on available evidence at the time of investigation. Trading statuses may change as new evidence emerges. This is not financial advice. Learn about our methodology.
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