2004 May: InvFisherTransformRSI.efs

[eSignal_JasonK]

File Name: InvFisherTransformRSI.efs


Description:
Based on The Inverse Fisher Transform by John Ehlers. This article appeared in the May 2004 issue of Stock & Commodities.

Formula Parameters:
N/A


Notes:
The related article is copyrighted material. If you are not a subscriber of Stocks & Commodities, please visit www.traders.com.
The May 2004 EFS formulas were provided by TS Support.

Download File:
InvFisherTransformRSI.efs




EFS Code:

// Magazine:        Technical Analysis of Stocks & Commodities, May 2004
// Article:        The Inverse Fisher Transform by John F. Ehlers
// Study:        INVERSE FISHER TRANSFORM OF RSI
// Provided By:    TS Support, LLC for eSignal

var RSI = null;

function preMain(){
    setStudyTitle("INVERSE FISHER TRANSFORM OF RSI");
    setCursorLabelName("IFish",0);
    setDefaultBarFgColor(Color.red,0);
    addBand(.5, PS_SOLID, 1, Color.black);
    addBand(-.5, PS_SOLID, 1, Color.black);
    setDefaultBarThickness(2);
    //setComputeOnClose();
}

function main(){
    wmaLength = 9;
    rsiLength = 5;
    if (RSI == null) RSI = new RSIStudy(rsiLength,"close");
    var IFish = 0, WtdSum = 0 ;

    Value1 = .1 * (RSI.getValue(RSIStudy.RSI) - 50);

    for(i = 0; i < wmaLength; i++)
        WtdSum += (wmaLength - i) * (.1 * (RSI.getValue(RSIStudy.RSI,-i) - 50)) ;
    CumWt = (wmaLength + 1 ) * wmaLength * .5 ;
    Value2 = WAverage = WtdSum / CumWt ;

    IFish = (Math.exp(2 * Value2) - 1) / (Math.exp(2 * Value2) + 1);

    return IFish;
}