Syntax for Esignal formulas?

[t1minator]

I really need this document. I am trying to get a $TRIN ma for an indicator. The built in function will not let me add a symbol to the MA. Can someone help me with this?

Thank you

[eSignal_JasonK]

Hello T1,

I'm assuming you wanted to plot this while your chart displays a different symbol. Let me know if you had a different intention.

The built in function for MAStudy doesn't accept "symbol" as a parameter. It uses the symbol of your chart by default. We have to calculate the moving average ourselves if we want to plot that data with a chart of a different symbol.

The formula I've created for you below will plot the simple moving average of $TRIN for 10 bars in an indicator pane. You can also right-click and edit the study to change the symbol or the number of bars (nLength) for this indicator.

var vSymbol = "";

function preMain() {
    setPriceStudy(false);
    setStudyTitle("Symbol, MA: ");
    setCursorLabelName(vSymbol + " MA ");
}

function ma(nSymbol, nLength) {
    if (nSymbol == null) {
        return null;
    }
    if (nLength == null) {
        nLength = 10;
    }
    var i;
    var vSum = 0.0;
    var vValue;

    vValue = getValue("Close", 0, -nLength, nSymbol);

    if(vValue == null) {
        return null;
    }

    for(i = 0; i < nLength; i++) {
        vSum += vValue[i];
    }

    return (vSum / nLength);

}

function main(nSymbol, nLength) {
    if (nSymbol == null) {
        nSymbol = "$TRIN";
    }
    if (nLength == null) {
        nLength = 10;
    }
    if (getBarState() == BARSTATE_ALLBARS) {
        vSymbol = nSymbol;
        preMain();
    }
    var MA = ma(nSymbol, nLength);

    return MA;
}

[t1minator]

Excellent, Thank you for the response

eom

[t1minator]

addBand give me an error

Jason,

Thank you for the post.

I tried to add addBand as below

I added this to the premain.

/* Add Bands to appear in the study window */
addBand(1.4, PS_SOLID, 2, Color.black);
addBand(0.6, PS_SOLID, 2, Color.black);

I get an error message that the 5th parameter is invalid.

I do not see a 5th parameter.

Help!

Thanks

Tim

[gspiker]

the 5th paramter is a unique label. If this is in premain, then all you really have to do is something like:

addBand(1.4, PS_SOLID, 2, Color.black, "UpperBand");
addBand(0.6, PS_SOLID, 2, Color.black, "LowerBand");

[t1minator]

Thanks, worked great!

This does not seem to be documented. I hope someone is taking notes