Theory :

Schaff trend cycle, as defined and described by Dough Schaff, is a sort of double stochastic of a macd. Macd is calculated as em(fast) - ema(slow). Here is a version that replaces ema in the calculation with Hull average.

Usage :

The usual way Schaff trend cycle is used - color changes can be used for signals, or you can define some levels as triggers for signals