The Gann Square of Nine, or the Gann Fixed Indicator, is a powerful trading tool used by Forex traders to identify support and resistance levels. It is often referred to as the ’45 degree angle’ method, as it involves plotting a series of diagonal lines onto a chart, which is based on 45 degree angles. Using this indicator, traders can calculate the probable support and resistance levels of a particular market. By doing so, they can identify key levels and anticipate where prices may move once these levels are reached. Furthermore, this indicator can also provide signals to enter and exit trades, allowing for a higher likelihood of success.