Gann angles theory is a technical analysis tool used to predict future price movements in financial markets. It is based on the idea that price movements follow specific geometric patterns and angles, which can be used to identify key support and resistance levels. The theory is named after its creator, W.D. Gann, who believed that the market was governed by natural laws and that these laws could be used to predict future price movements. Gann angles are drawn on price charts using a series of lines that represent different angles of price movement. These angles are based on the relationship between price and time, and are used to identify key levels of support and resistance. The theory is widely used by traders and investors in the financial markets, and is considered to be one of the most effective technical analysis tools available.