William Delbert Gann (June 6, 1878 – June 18, 1955) or WD Gann, was a finance trader who developed securities trading technical analysis methods. (From Wikipedia)
More about William D. Gann:Books by William D. Gann:
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Gann, William D., 1878-: 45 Years in Wall Street: A Review of the 1937 Panic and 1942 Panic, 1946 Bull Market, With New Time Rules and Percentage Rules with Charts for Determining the Trend on Stocks (Miami: W. D. Gann, c1949) (page images at HathiTrust; US access only)- Gann, William D., 1878-: The Tunnel Thru the Air: or, Looking Back From 1940 (New York: Financial Guardian Pub. Co., c1927) (multiple formats at archive.org)
Additional books by William D. Gann in the extended shelves:
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Gann, William D., 1878-: The tunnel thru the air : or, Looking back from 1940 (Financial Guardian Pub. Co., 1927), also by Michael Erlewine (page images at HathiTrust)
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