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01-04-2007, 1:31 PM anatolik Joined on 12-15-2006 Posts 1 iRSI implementation issue Hi, It looks like there is a bug in iRSI class Relative Strength Index (RSI) calculation. In the source code I see the following expression for smoothed RS calculation: RS = (((prevGain*(Periods-1))+AvgGain)/Periods) / ((((prevLoss*(Periods-1))+AvgLoss)/Periods)); Usually smoothed RS is calculated using the following formula: Smoothed RS = ((previousAvgGain*(Periods-1)+CurrentGain)/Periods) / ((previousAvgLoss*(Periods-1)+CurrentLoss)/Periods) So there must be Current Gain/Loss instead of AvgGain/AvgLoss in the source code (Indicators.cs, line 830). Regards, Anatoli    Report

01-14-2007, 9:12 PM asimon Joined on 03-07-2006 Posts 140 Re: iRSI implementation issue Yes, I see the discrepancy in the formula in Indicators.cs, line 830 and the formula at http://stockcharts.com/education/IndicatorAnalysis/indic_RSI.html To fix this error, the class will have to be reworked with the circular queue class instead of a simple array to keep the current gain synchronized with the previous average gain value. Thanks for bringing this issue to light.    Report

06-20-2007, 2:33 PM JoeMama Joined on 06-07-2007 Posts 5 Re: iRSI implementation issue Any Luck on Updating this Issue. I would like to use this indicator, but I have no idea how to fix this problem.    Report

07-07-2007, 9:21 AM asimon Joined on 03-07-2006 Posts 140 Re: iRSI implementation issue I expect the solution to this problem to be submitted by a forum user. The user who submits such a contribution gets access to the source code forum.    Report

03-09-2009, 11:45 AM bennean Joined on 10-08-2008 Posts 2 Re: iRSI implementation issue Is this source code still being maintained? It's now March 2009 and the RSI bug is still there, and I'm surprised it hasn't been fixed by now. I guess I'll have a look at it myself...    Report

03-09-2009, 4:28 PM davidjjon Joined on 03-10-2009 Posts 1 Re: iRSI implementation issue Hi bennean, It does not look like this code is being maintained; however, I am working with source. I am interested in what development you are doing JK @ SoftwareByDavid.com David Roh    Report

03-10-2009, 3:08 AM bennean Joined on 10-08-2008 Posts 2 Re: iRSI implementation issue I'm looking at Technical Analysis in the context of betting exchanges. 4XLab seemed to offer a whole bunch of indicators, but I've found a bug in EMA and now RSI. Like they say, there's no such thing as a free lunch!    Report

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