William D. (William Delbert) Gann

Born in Lufkin, Texas, on June 6, 1878, William Delbert Gann became known as W. D. Gann, a trader and financial writer whose ideas left a lasting mark on market lore. He wrote about stocks and commodities and developed methods that linked price movement with geometry, timing, and recurring market patterns.

Gann is especially associated with techniques such as Gann angles and other chart-based tools that later generations of traders continued to study. He also wrote books including Truth of the Stock Tape and The Tunnel Thru the Air, blending practical market advice with a more symbolic, sometimes esoteric style that helped build his reputation.

His work has remained influential partly because it inspires both admiration and debate. Supporters see him as an original thinker in technical analysis, while critics question how well his methods can be proven. He died in 1955, but his name still comes up whenever readers explore the history of market forecasting.