CustomFuncRef.efs

[eSignal_JasonK]

File Name: CustomFuncRef.efs

Description:
This formula outlines a method for referencing past values of an indicator using a global array. This is an alternative method to using the ref() function.

Formula Parameters:
None.

Notes:
The chart plots the midpoint displaced by 10 bars to the right. If ref() is used in a formula that is being called by call() or callFunction(), you may experience unexpected results. Use this method as a work around.

Download File:
CustomFuncRef.efs




EFS Code:

/*******************************
Provided By : eSignal. (c) Copyright 2003
*******************************/
// Updated: 01/27/03

function preMain() {
    setPriceStudy(true)
    setStudyTitle("How to reference past values of custom indicator using an array.");
    setDefaultBarFgColor(Color.blue)
    setCursorLabelName("Value ");
}

var myArray = new Array(10);
var myValue = null;

function main() {   
    var nBarState = getBarState();
    
    if (nBarState == BARSTATE_NEWBAR && myValue != null) {
        myArray.pop();              //removes last array element
        myArray.unshift(myValue);   //inserts array element to the front of the array 
    }

    myValue = ((high() + low()) / 2);
    if (myValue == null) {
        return;
    } 
    
    if (myArray[9] != null) {
        return myArray[9];
    } else {
        return;
    }
}