The Radar Signal Indicator is a useful and popular free Forex indicator for MT4. The indicator works by analyzing price movement and chart patterns to identify potential buy and sell signals. It is a great tool for technical traders as it can be used to identify trend reversals, breakouts, and other important market movements. The indicator also includes features such as customizable alerts, customizable parameters, and an easy-to-use interface. With its powerful features and easy-to-use interface, the Radar Signal Indicator has become a popular choice among Forex traders.