Marsie is an EMA-RSI indicator and part of the 'keeping it simple' series that have a similar color scheme. The RSI 'Relative Strength Index' is a momentum oscillator, measuring the velocity and magnitude of directional price movements. it is measured from 0 - 100 with 30 and 70 being low "oversold" and high "overbought" conditions. It is also commonly used to determine bullish or bearish divergences. The EMA aspect is the 'Exponential Moving Average' which has had the RSI calculation added to it and acts a signal line when the RSI crosses it for buy and sell opportunities.