The Murrey Math Indicator is a popular and free Forex indicator for the MT4 trading platform. It is a useful tool for traders who need to identify key support and resistance levels for a given currency pair. The indicator works by plotting a series of lines on the chart, which represent the various support and resistance levels. It also provides a visual representation of the trend direction and momentum. The Murrey Math Indicator is a great tool for traders who are looking for a reliable way to identify key levels in the market and make informed trading decisions.