Rate Of Chanege MA

[gwika]

Is there a way to add a MA or a Parabolic SAR to the following efs?
/************************************************** *****************
Description : This Indicator plots Rate Of Change indicator
Provided By : Developed by TS Support, LLC for eSignal. (c) Copyright 2002
************************************************** ******************/

function preMain()
{
setPriceStudy(false);
setStudyTitle("RateOChangeFromStart");
setCursorLabelName("RateOChangeFromStart");
}
var FVal = null;
function main(sPrice)
{
if (sPrice == null) sPrice = "Close";
var Price = getValue(sPrice, 0);
if (FVal == null) FVal = Price;
var RateOChangeFromStart = (Price * 100) / FVal - 100;
return RateOChangeFromStart;

[ACM]

Re: Rate Of Chanege MA

gwika
The easiest solution is to write another efs that calls that one using the efsExternal() function (for the description and syntax of this function see the link to the related article in the EFS KnowledgeBase)
The efsExternal() function creates a series which you can then use as a custom source for the moving average [or other function] as shown in the example enclosed below. Note that this example is only to illustrate the required logic and is not necessarily the most efficient way to write the formula.
Alex

function main(sPrice){
    if (sPrice == null) sPrice = "Close";
    var Study = efsExternal("\\\\path_to_efs, name_of_efs.efs", sPrice);
    var MAofStudy = sma(10, Study)
    return new Array (Study.getValue(0), MAofStudy.getValue(0))
} 

Originally posted by gwika
Is there a way to add a MA or a Parabolic SAR to the following efs?
/************************************************** *****************
Description : This Indicator plots Rate Of Change indicator
Provided By : Developed by TS Support, LLC for eSignal. (c) Copyright 2002
************************************************** ******************/

function preMain()
{
setPriceStudy(false);
setStudyTitle("RateOChangeFromStart");
setCursorLabelName("RateOChangeFromStart");
}
var FVal = null;
function main(sPrice)
{
if (sPrice == null) sPrice = "Close";
var Price = getValue(sPrice, 0);
if (FVal == null) FVal = Price;
var RateOChangeFromStart = (Price * 100) / FVal - 100;
return RateOChangeFromStart;