The difference from RSI is that it uses price change for a specified period (i.e. the momentum) instead of the price changes of two adjacent bars. The rest of the calculations are similar to RSI. The indicator was developed by Roger Altman and was first published in February 1993 in the Technical Analysis of Stocks & Commodities magazine.
Interpretation of the signal is the same as that of the relative strength index:
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/1786
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.