William Eckhart on Gann trading (Jack Schwager's Market Wizards book):

"I have always been amazed by how many people are oblivious to the time scale-dependent nature of chart angles or unconcerned about its ramifications. My realization of the inherent arbitrariness of slope of line methods is precisely why I've never been willing to spend five minutes on Gann angles or the works by the proponents of his methodology."

About W D Gann and George Bayer