Richard D. Wyckoff was an influential American stock market trader and author, known for his contributions to technical analysis. He developed the Wyckoff Method, a trading strategy that focuses on price action and volume to identify market trends and potential reversals. His work laid the foundation for many modern trading techniques. Born in 1873, Wyckoff was also a pioneer in market psychology and the study of supply and demand dynamics. He founded the Stock Market Institute and wrote several books, including "Studies in Tape Reading," which helped educate traders on market behavior and decision-making processes.