EFS for Alert with inv()

[elmi]

I try to make an efs for an alert when a MA crosses the price but with interval inv(). This is what I wrote but when I put the interval on then the application crashes.
----------

var vEMA34;
var vLastAlert = -1;

function preMain() {
  
    setPriceStudy(true);
    setStudyTitle("");
    setCursorLabelName("?", 0);
    setDefaultBarStyle(PS_SOLID, 0);
    setDefaultBarFgColor(Color.red, 0);
    setDefaultBarThickness(1, 0);
    setPlotType(PLOTTYPE_LINE, 0);
  
   
}

function main() {
vEMA34 = new MAStudy(34, 0, "Close", MAStudy.EXPONENTIAL, inv(1));  

if (close() > vEMA34.getValue(MAStudy.MA))
    
     onAction1()
    else if (close() < vEMA34.getValue(MAStudy.MA))
     onAction2();
    return vEMA34.getValue(MAStudy.MA);
}

function postMain() {
}

    function onAction1() {
        if (vLastAlert != 1) Alert.playSound("C:\\Program Files\\eSignal\\Sounds\\Alarm.wav");
        if (vLastAlert != 1) Alert.addToList(getSymbol(), "34EMA-Cross UP", Color.black, Color.green);
        vLastAlert = 1;
    }
   
    function onAction2() {
        if (vLastAlert != 2) Alert.playSound("C:\\Program Files\\eSignal\\Sounds\\Alarm.wav");
        if (vLastAlert != 2) Alert.addToList(getSymbol(), "34EMA-Cross Down", Color.red, Color.red);
        vLastAlert = 2;
    } 

.................
I have the latest esignal 7.9.1.
Any Ideas
Elias

[ACM]

Elias
That is happening because you are using inv() which is an EFS2 function with an EFS1 study. Replace
vEMA34 = new MAStudy(34, 0, "Close", MAStudy.EXPONENTIAL, inv(1));
with
vEMA34 = ema(34,close(inv(1)));
Also replace every instance of vEMA34.getValue(MAStudy.MA); with vEMA34.getValue(0);
For information on all the EFS2 functions and their syntax refer to the EFS2 Function Reference in the
EFS KnowledgeBase
Alex

[elmi]

IT WOrks fine thanks alot Alexis.



Elias