What is Technical Analysis ?

Technical Analysis is a method of evaluating future security prices and market directions based on statistical analysis of variables such as trading volume, price changes, etc., to identify patterns.A stock market term - The attempt to look for numerical trends in a random function. The stock market used to be filled with technical analysts deciding what to buy and sell, until it was decided that their success rate is no better than chance. Now technical stock analysis is virtually non-existent.
The Readers Submitted Examples page has more on this topic.
Technical analysts study trading histories to identify price trends in particular stocks, mutual funds, commodities, or options in specific market sectors or in the overall financial markets. They use their findings to predict probable, often short-term, trading patterns in the investments that they study. The speed (and advocates would say the accuracy) with which the analysts do their work depends on the development of increasingly sophisticated computer programs.