Technical analysis is a method of forecasting the direction of prices through the study of past market data, such as historical prices and trading volumes. It assumes that market behavior repeats itself, and that current prices already reflect all known information. Technical analysts use various methods and tools like charts, indicators and patterns to identify trends and trend reversals in the market. Some of the common technical analysis techniques include Dow theory, Elliott wave theory, and the use of charts like line charts, bar charts and Japanese candlestick charts to identify patterns in price movements over time.