The indicator shows the probabilistic reverses.
Its developers affirm that the price will most likely turn the opposite direction, as soon as the levels +0.5 and -0.5 are reached.
This indicator was first implemented in MQL4 and published in Code Base at mql4.com 14.10.2008.
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/534
Range Expansion Index (REI) is an oscillator that measures price changing rate and signals about overbought/oversold areas, in case a price shows weakness or strength.Swing Index
Swing Index is a math expression of the operations activity for the last two bars.