Richard Schabaker (1902-1938) -- the father of capital market technical analysis! He was the first to classify the forms of general charts, research and create the famous "reversion and persistence" theory, "split" theory and "support and resistance" theory, and stereotype the use of trend lines and fully emphasize the importance of support and resistance levels. (The predecessor of the "box" theory)

Price theory is a theory of measuring stock prices, first described in the book Stock Market Indicators by Joseph E. Granville, an American stock market analyst.