[Finance] Gann, William D.
Truth of The Stock Tape and Wall Street Stock Selector
New York: Financial Guardian Publishing Co., (1923). First edition. Two titles in one volume. 8vo. 185; 205, xvi pp. appendix, 46, (1) pp. Illustrated with frontispiece portrait of Gann and numerous charts. Publisher's purple cloth-covered boards, stamped in blind and in gilt, spine sunned; pp. 88/89 in second title toned, scattered marginal annotations in pencil.William D. Gann (1878-1955), was a financial trader who developed a number of technical analysis methods such as Gann angles, Square of Nine, the Hexagon chart, and the Circle of 360. He based his methods off of numerous, sometimes unorthodox, sources, including geometry, astronomy, astrology, and ancient mathematics.