Smoothed Fast Adaptive Trend Line indicator

The Smoothed Fast Adaptive Trend Line (SFatl) is a trend indicator which use a low frequency digital filter (FLF-1). Additional smoothing is used to prevent of generate wrong signals at each occasional market move.

Bear in mind, the "Smoothing parameter" value varies in the meaning depending on algorithm:

1. JJMA has smoothing parameter gap -100/+100
2. T3 smoothing parameter is multiplied by 100 for better visualization
3. Smoothing parameter for VIDYA is CMO period
4. Smoothing parameter for AMA is a slow EMA period