Technical analysis is a method of forecasting the direction of prices through studying past market data like price and volume. It assumes that market patterns repeat and prices move in trends. The key tenets of technical analysis are that: 1) Price movement is determined by supply and demand forces, 2) Trends persist but also reverse, 3) Price patterns repeat. Technical analysis uses charts and patterns to identify trends and predict future price behavior, in contrast to fundamental analysis which examines financial statements.