The indicator draws (in a separate window) the Bollinger Bands ® relative to the moving average and projection of the price bars.
The drawing looks like a pulse.

Translated from Russian by MetaQuotes Software Corp.
Original code: http://www.mql5.com/ru/code/851
the trend change is a bit slow on the bands, anyway to combine it with a fast adx / rsi or even a 2nd band crossing in a different color to ID trend change faster?