William Delbert Gann, also known as WD Gann, is the developer of technical analysis methods like Gann angles. 

WD Gann work and findings are based on geometry, astronomy, Astrology  and ancient mathematics..

W.D GAnn Tools

Time & Price Analysis

Financial Astrology

Square Of 9

the Square of Nine, is sometimes called a “Square Root Calculator” or a device that “Squares the Circle.”