The real author:
The trend indicator drawn on the basis of the Bollinger Bands. The indicator is written by the book by J. Bollinger "Bollinger on Bollinger Bands".
The interpretation of the indicator is simple. The indicator histogram displays the position of price in relation to Bollinger Bands. The exit of the indicator line beyond the limits of -25 or +25 means the exit beyond low or upper line of bands respectively.
This indicator was first implemented in MQL4 and published in Code Base on 30.09.2008.
Fig.1 The i-BandsPrice indicator
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/1350
The Acceleration/Deceleration Indicator (AC) measures acceleration and deceleration of the current driving force.Average Directional Movement Index (ADX)
The Average Directional Movement Index Indicator (ADX) helps to determine if there is a price trend.