Source: https://fxcodebase.com/code/viewtopic.php?f=17&t=1340
Forum: 17 · Topic 1340 · 3 post(s)
Nikolay.Gekht · Tue Jun 15, 2010 9:13 am
The cumulative RSI is intended to be used in cumulative RSI strategy described in Chapter 9 of Trading Strategies That Work by Larry Connors and Cesar Alvarez.
The formula is pretty simple: CumulativeRSI = SUM(RSI(N), X)
The book recommends to use the small numbers for N and X, such as 2.

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See also CumulativeRSI signal: viewtopic.php?f=29&t=1341
The indicator was revised and updated
Alexander.Gettinger · Fri Jan 09, 2015 4:17 pm
MQL4 version of Cumulative RSI oscillator: viewtopic.php?f=38&t=61694.
Apprentice · Tue Jul 18, 2017 7:50 am
The indicator was revised and updated.