barIndex of -1 returns same cci value as 0

[windswepttom]

Hi,
When I change the barIndex form 0 to -1 for the cci I get the same value?

function preMain() {
setPriceStudy(false);
setStudyTitle("CCI");
setCursorLabelName("CCI",0);
setCursorLabelName("CCI last",1);
setDefaultBarFgColor(Color.blue,0);
setDefaultBarThickness(2,0);
}

var cbCCI_Var = 0;
var cbCCI = 0;
var nCCIPeriod = 14;
var nCCISource = "hlc3()";

function main() {

cbCCI = cci(14,hlc3(),null,null,0);
cbCCI_last = cci(14,hlc3(),null,null,-1);
// cbCCI_Var = cci(14,nCCISource).toFixed(2)*1;

var retArray = new Array(2);

setBarFgColor(Color.blue, 0);
setBarFgColor(Color.red, 1);
retArray[0] = cbCCI;
retArray[1] = cbCCI_last;

return retArray;
}

Thanks
Tom

[ACM]

Tom
That is happening because the syntax used in the cci() functions in the following lines
cbCCI = cci(14,hlc3(),null,null,0);
cbCCI_last = cci(14,hlc3(),null,null,-1);
is incorrect for what you are trying to accomplish.
If you are not using the sym() or inv() parameters you do not need to add nulls as those parameters are optional. Furthermore if you were to use them they would need to be nested inside the hlc3() function.
Try writing those two lines as follows
cbCCI = cci(14,hlc3(),0);
cbCCI_last = cci(14,hlc3(),-1);
and you should get the expected results
Alex

[ACM]

Tom
You may also want to see this post which provides a complete series of examples on how to implement the parameters in an efs2 function.
Alex

[windswepttom]

Thank You again Alexis.

Your examples are very good and now I understand.

[ACM]

Tom
You are most welcome and thank you for the compliments.
Alex