modify an indicator

[wdgigi]

Good morning,

I have tried to modify an efs already built on the forum international and I have jammed when I wanted that the parameters "lenght" and "offset" they were modifiable in edit studies.
Here under the script: who succeeds me in correcting the error or to explain how to do?


//{{EFSWizard_Description

//

// This formula was generated by the Alert Wizard

//

//}}EFSWizard_Description 7532


//{{EFSWizard_Declarations

var fp1 = new FunctionParameter("Length", FunctionParameter.NUMBER);
fp1.setLowerLimit(1);
fp1.setDefault(32); //Edit this value to set a new default

var fp2 = new FunctionParameter("Offset", FunctionParameter.NUMBER);
fp2.setDefault(-16); //Edit this value to set a new default

var vSMAhs = new MAStudy("Length", "Offset", "Close", MAStudy.SIMPLE);

var vSMA1 = new MAStudy(1, 0, "Close", MAStudy.SIMPLE);

var vLastAlert = -1;

//}}EFSWizard_Declarations 15636


function preMain() {

/**

* This function is called only once, before any of the bars are loaded.

* Place any study or EFS configuration commands here.

*/

//{{EFSWizard_PreMain

setPriceStudy(false);

setStudyTitle("Hurst Inverse");

setCursorLabelName("Hurst Inverse", 0);

setDefaultBarStyle(PS_SOLID, 0);

setDefaultBarFgColor(Color.red, 0);

setDefaultBarThickness(1, 0);

setPlotType(PLOTTYPE_HISTOGRAM, 0);

//}}EFSWizard_PreMain 28595

}

function main(Length,Offset) {

/**

* The main() function is called once per bar on all previous bars, once per

* each incoming completed bar, and if you don't have 'setComputeOnClose(true)'

* in your preMain(), it is also called on every tick.

*/

//{{EFSWizard_Expressions

//{{EFSWizard_Expression_1

if (

vSMA27.getValue(MAStudy.MA) > 0

) onAction1();

//}}EFSWizard_Expression_1 8204

//}}EFSWizard_Expressions 18787

if(getBarState()==BARSTATE_NEWBAR){

var vDiff = vSMA1.getValue(MAStudy.MA,offset) -vSMAhs.getValue(MAStudy.MA,offset);

setBar(Bar.Value,offset,vDiff);

setBar(Bar.FgColor,offset,Color.RGB(155,0,0));

}

if (vSMA1.getValue(MAStudy.MA)==null||vSMAhs.getValue (MAStudy.MA)==null)

return;

//{{EFSWizard_Return

return vSMA1.getValue(MAStudy.MA) -vSMAhs.getValue(MAStudy.MA);

//}}EFSWizard_Return 5458

}

function postMain() {

/**

* The postMain() function is called only once, when the EFS is no longer used for

* the current symbol (ie, symbol change, chart closing, or application shutdown).

*/

}

//{{EFSWizard_Actions

//{{EFSWizard_Action_1

function onAction1() {

setBarFgColor(Color.RGB(155,0,0));

vLastAlert = 1;

}

//}}EFSWizard_Action_1 10981

//}}EFSWizard_Actions 20204

**************************************************
**

thx.

gigi