The Second Chart Indicator is a useful and popular Forex indicator that can be used with the MT4 platform. It is free to use and can provide traders with a great way to analyse the Forex markets. The indicator works by plotting a second chart on top of the main chart, allowing traders to view the same chart in two different ways. This can be useful for spotting trends, reversals, and other market movements. Overall, the Second Chart Indicator is a great tool for Forex traders of all levels and is a great way to gain an edge in the markets.