xBest MA RSI EA Rv3.57c MQ4 Source Code is an expert advisor that automates trading decisions based on a blend of two technical indicators: moving averages and the RSI. Moving averages help traders identify trends by smoothing out price data over a specified period, making it easier to recognize the direction of the market. The RSI, on the other hand, measures the speed and change of price movements, effectively gauging whether an asset is overbought or oversold.