TSI Momentum

[dloomis]

From an esignal user who emailed me...

I do not know how to put this in Javascript code.

TSI formulae is:


TSI(Close,r,s) = 100 * EMA(EMA(MTM,r),s)/EMA(EMA(|MTM|,r),s)


Where MTM = Momentum = Close [today] - close[yesterday]

computed for r =32, s = 5 days...

[TS Support]

Hi,

Here is the TSI code:

/*******************************************************************
Description	: This Indicator plots TSI indicator
Provided By	: Developed by TS Support, LLC for eSignal. (c) Copyright 2002 
********************************************************************/

function preMain()
{
    setStudyTitle("TSI"); 
    setCursorLabelName("TSI", 0);
    setCursorLabelName("SigLine", 1);
    setCursorLabelName("ZeroLine", 2);
    setDefaultBarFgColor(Color.red, 0);
    setDefaultBarFgColor(Color.blue, 1);
    setDefaultBarFgColor(Color.grey, 2);
}
var XA1_1 = 0.0;
var XA2_1 = 0.0;
var XA3_1 = 0.0;
var aXA1_1 = 0.0;
var aXA2_1 = 0.0;
var aXA3_1 = 0.0;
var XA_1 = 0.0;


var XA1 = 0;
var XA2 = 0;
var XA3 = 0;
var aXA1 = 0;
var aXA2 = 0;
var aXA3 = 0;
var XA = 0;


function main(sPrice, r, s, u, ZeroLine, SmthLen)
{
    if (sPrice == null) sPrice = "Close";
    if (r == null) r = 4;
    if (s == null) s = 8;
    if (u == null) u = 6;
    if (ZeroLine == null) ZeroLine = 0;
    if (SmthLen == null) SmthLen = 13;

    // makes sense    
    var Price = getValue(sPrice, 0, -2);
    // MAG
    if(Price == null) {
    	return;
    }

    var vPrice = Price[0] - Price[1];

    // MAG (moved from bottom of formula)    
    if (getBarState() == BARSTATE_NEWBAR)
    {
        XA1_1 = XA1;
        XA2_1 = XA2;
        XA3_1 = XA3;
        aXA1_1 = aXA1;
        aXA2_1 = aXA2;
        aXA3_1 = aXA3;
        XA_1 = XA;
    }
    /**
    XA1 = XA1_1;
    XA2 = XA2_1;
    XA3 = XA3_1;
    aXA1 = aXA1_1;
    aXA2 = aXA2_1;
    aXA3 = aXA3_1;
    XA = XA_1;
    **/
    
    
    // constants
    var FactorR = 2 / (r + 1);
    var FactorS = 2 / (s + 1);
    var FactorU = 2 / (u + 1);
    
    // MAG removed 'var' 
    XA1 = FactorR * vPrice + (1 - FactorR) * XA1_1;
    XA2 = FactorS * XA1 + (1 - FactorS) * XA2_1;
    XA3 = FactorU * XA2 + (1 - FactorU) * XA3_1;

    vPrice = Math.abs(Price[0] - Price[1]);

    // MAG removed 'var'
    aXA1 = FactorR * vPrice + (1 - FactorR) * aXA1_1;
    aXA2 = FactorS * aXA1 + (1 - FactorS) * aXA2_1;
    aXA3 = FactorU * aXA2 + (1 - FactorU) * aXA3_1;

    var Val1 = 100 * XA3;
    var Val2 = aXA3;
    var TSI = 0.0;

    if (Val2 != 0) TSI = Val1 / Val2;
    else TSI = 0.0;

    var Factor = 2 / (SmthLen + 1);
    
    // MAG removed 'var'
    XA = Factor * TSI + (1 - Factor) * XA_1;

    return new Array(TSI, XA, ZeroLine);
}

Regards,
Andy