The R-Squared Indicator MT5 is a popular and free Forex indicator that is useful for traders. The R-Squared Indicator MT5 works by measuring the correlation between the price of a currency pair and a given indicator. It then plots the correlation coefficient on a chart, giving traders a visual representation of the strength of the relationship. With its straightforward design and helpful visualizations, the R-Squared Indicator MT5 is a popular and useful tool for Forex traders.