Smoothed RSI

/*********************************Provided By:      eSignal (Copyright c eSignal), a division of Interactive Data     Corporation. 2009. All rights reserved. This sample eSignal     Formula Script (EFS) is for educational purposes only and may be     modified and saved under a new file name.  eSignal is not responsible    for the functionality once modified.  eSignal reserves the right     to modify and overwrite this EFS file with each new release.Description:            Smoothed RSI    Version:            1.0  05/04/2009    Formula Parameters:                     Default:    Length                              10Notes:    This is new version of RSI oscillator indicator, developed by John Ehlers.     The main advantage of his way of enhancing the RSI indicator is smoothing     with minimum of lag penalty. **********************************/var fpArray = new Array();var bInit = false;function preMain() {	setPriceStudy(false);	setStudyTitle("SRSI");	setCursorLabelName("SRSI", 0);	setDefaultBarFgColor(Color.blue, 0);    setStudyMax(1.1);    setStudyMin(-0.1);    var x = 0;    fpArray[x] = new FunctionParameter("Length", FunctionParameter.NUMBER);    with(fpArray[x++]) {        setLowerLimit(1);        setDefault(10);    }}Smooth23 = new Array();var xSRSI = null;function main(Length) {var nBarState = getBarState();var nSRSI = 0;    if (nBarState == BARSTATE_ALLBARS) {        if (Length == null)	Length = 10;    }     if (bInit == false) {        xSRSI = efsInternal("Calc_SRSI", Length);        bInit = true;    }    nSRSI = xSRSI.getValue(0);    if (nSRSI == null) return;    return nSRSI;}var bSecondInit = false;var xValue = null;function Calc_SRSI(Length){var nRes = 0;var i = 0;var	CU23 = 0;var	CD23 = 0;    if (bSecondInit == false) {        xValue = efsInternal("Calc_Value");        bSecondInit = true;    }    if (xValue.getValue(-Length) == null) return;	for(i = 0; i < Length - 1; i++){		if(xValue.getValue(-i) > xValue.getValue(-(i + 1)))			CU23 += xValue.getValue(-i) - xValue.getValue(-(i + 1));		if(xValue.getValue(-i) < xValue.getValue(-(i + 1)))			CD23 += xValue.getValue(-(i + 1)) - xValue.getValue(-i);	}	if(CU23 + CD23 != 0)	nRes = CU23/(CU23 + CD23);	return nRes;    }var xClose = null;function Calc_Value() {var nRes = 0;    if (xClose == null) xClose = close();    if (xClose.getValue(-3) == null) return;    nRes = (xClose.getValue(0) + 2 * xClose.getValue(-1) + 2 * xClose.getValue(-2) + xClose.getValue(-3) ) / 6    return nRes;}