by fx1618 on 9/11/09
William Delbert Gann (or as he preferred W.D. Gann) was a pioneer in the area of time and price analysis of market activity. Born in Lufkin Texas in 1878, Gann's basic premise was the future is just a repetition of the past and that time governed all market movements.
Gann traded with and taught time and price analysis methods that could predict market highs and lows. Gann reputedly had the knowledge to forecast the price and time of the yearly high and low for commodities and stocks.

Each year Gann published a forecast for the following year. In 1928 he published a forecast of the date of the September 1929 US Stock Market High and that a Black Friday would occur A FULL YEAR IN ADVANCE.

In 1932 he recommended buying stocks at the all time low in the Dow in June and July. ............

http://www.fx1618.com/wd-gann.html