The MACD on RSI indicator is a useful and popular free Forex indicator for MT4. It is used to identify potential trading opportunities by analyzing the divergence between the Moving Average Convergence Divergence (MACD) and Relative Strength Index (RSI) indicators. This can be used to identify potential entry and exit points in the market. The indicator is easy to use and is available for free on most MT4 trading platforms. The indicator is popular among traders because it helps them identify potential trading opportunities in the Forex market.