FATL (Fast Adaptive Trend Line) - the «fast» adaptive trend line is calculated using a digital low-pass filter (cream-colored line on the chart).
More details here.
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/7380
Example of optimization using the "running total" method.TTF
The classic TTF with the T3 smoothing method and signal lines.