The stock market teacher: Technical analysis for the post-crash period

Joseph Ensign Granville (August 20, 1923 - September 7, 2013), often called Joe Granville, was a financial writer and investment speaker. He popularized the use of "on balance volume", a technique of technical analysis that attempts to predict future prices of stocks, commodities, and other financial assets traded on financial markets for which historical price and volume information is available.