Mulloy's Triple EMA: 3EMA - 3EMA(EMA) + EMA(EMA(EMA)).
Center of mass. Exclusive with span/halflife/alpha.
Span (default smoothing parameter).
Halflife.
Smoothing parameter.
https://screamer.readthedocs.io/en/latest/ for the Python reference and full details.
Mulloy's Triple EMA: 3EMA - 3EMA(EMA) + EMA(EMA(EMA)).