Amplitude is the measurement of the difference between the variable's extreme values. This indicator is based on the Balance of Power (close-open)/(high-low). Instead of taking the value of a single candlestick , exponential moving averages are used in the formula. On it's lowest settings (1,2) it's exactly the same as the Balance of power , by adjusting the smoothing you can seen the highs and lows in momentum of the chosen period. (highly adjustable RSI ) By adding a simple moving average (Signal Line) it turns into a cross-over type, like MACD with a histogram.
This indicator is doesn't have a default or 'best' setting, instead I use the Fibonacci numbers as input. (1,2,3,5,8,13,21,34,55,89,144). Depending on its settings this indicator is well suited for binary options, trend and reversal trading.