Reference error and getValue error Please Help

[whatever]

Cut and past the script then load it and you will get a reference error message; "myDCHstudy1 is not defined" .

I have written many script that are very similiar in form and I don't know why this error is occuring.

Next cut; vVClose = getValue("Close", 0, -Lgth);
//if (vVClose == null) return;
and paste it below; if (vValueH1 == null|| vValueL1 == null ) return;

Then load the script and you will get no error message but there will be no values for vVClose.

I am stumped. As I said I have written a varity of scriptd that follow the same form and have not had these problems.

Thanks for the help.




function preMain(){
setStudyTitle("DCH ROC");
setCursorLabelName("ROC",0);
setDefaultBarFgColor(Color.red,0);
setPriceStudy(false);


var fp1 = new FunctionParameter("Length", FunctionParameter.NUMBER);
fp1.setName("DCH Length");
fp1.setDefault(4);
fp1.setLowerLimit(1);

var fp2 = new FunctionParameter("Lgth", FunctionParameter.NUMBER);
fp2.setName("Close Length");
fp2.setDefault(8);
fp2.setLowerLimit(1);

}

var vVClose = null;//vValueH1 = null, vValueL1 = null,

function main(Length, Lgth){
var vSm, vValueH1, vValueL1;

vVClose = getValue("Close", 0, -Lgth);
//if (vVClose == null) return;

if (getBarState() == BARSTATE_ALLBARS) {
myDCHstudy1 = new DonchianStudy(Length, 0);
}

vValueH1 = myDCHstudy1.getValue(DonchianStudy.UPPER);
vValueL1 = myDCHstudy1.getValue(DonchianStudy.LOWER);
if (vValueH1 == null|| vValueL1 == null ) return;


// vSm = 0;
//for(i = 0; i < Lgth+1; i++) {
// vSm += vC[i] - vC[i + 1];
// }

//vSm = vSm/(vValueH1-vValueL1);

return new Array ( vVClose );
}

[ACM]

whatever
Try the enclosed revision of your efs.
In the return I selected to use the current value of the array but if you remove the [0] it will plot all the values in the array
Alex

var myDCHstudy1 = null;

function preMain(){
    setStudyTitle("DCH ROC");
    setCursorLabelName("ROC",0);
    setDefaultBarFgColor(Color.red,0);
    setPriceStudy(false);
    
    
    var fp1 = new FunctionParameter("Length", FunctionParameter.NUMBER);
    fp1.setName("DCH Length");
    fp1.setDefault(4);
    fp1.setLowerLimit(1);
    
    var fp2 = new FunctionParameter("Lgth", FunctionParameter.NUMBER);
    fp2.setName("Close Length");
    fp2.setDefault(8);
    fp2.setLowerLimit(1);
    
}

function main(Length, Lgth){

    var vVClose = getValue("Close", 0, -Lgth);
    
    if(myDCHstudy1==null) myDCHstudy1 = new DonchianStudy(Length, 0);

    var vValueH1 = myDCHstudy1.getValue(DonchianStudy.UPPER);
    var vValueL1 = myDCHstudy1.getValue(DonchianStudy.LOWER);
    if (vValueH1 == null|| vValueL1 == null ) return; 


    //vSm = 0;
    //for(i = 0; i < Lgth+1; i++) {
    //     vSm += vC[i] - vC[i + 1];
    // }

    //vSm = vSm/(vValueH1-vValueL1);

    return vVClose[0];
} 

[whatever]

Doh!!!

Got it. Thanks for the help.