The RVI Forex indicator is a popular and free MT4 indicator that is useful for traders of all levels. It is a momentum indicator that measures the strength of the trend in the market. The indicator is based on the Relative Strength Index (RSI) and uses the RSI to identify overbought and oversold levels in the market. The indicator is easy to use and can be used to identify entry and exit points in the market. The RVI indicator is a great tool for traders who want to take advantage of the momentum in the market and make informed trading decisions.