This book excerpt details successful trend-following trading strategies, emphasizing risk management and disciplined adherence to pre-established rules. It profiles several traders who achieved substantial profits, even during market crashes, by focusing on objectively verifiable data and ignoring market noise. The authors highlight the importance of systematic approaches, emphasizing that consistent application of rules, rather than market timing or prediction, is key to long-term success. Several case studies illustrate how different traders developed and refined their strategies, showcasing both their triumphs and setbacks. The text challenges the "buy and hold" mentality prevalent in traditional investing and advocates for a more active, rules-based approach.