Study on Study?

[rupe]

Hi

Where can I find a general outline for study on study and learn how to do it?

-Rupe

[eSignal_JasonK]

Hello Rupe,

When looking at the EFS2 reference articles in the EFS KnowledgeBase for the Built-in Study Functions, anytime you see the "source" parameter option means you can specify another study as the source for that built-in. This can be done in-line or you can pass a Series Object variable to the function.

Take the sma() function for example.
sma( length [, source | sym() | inv()] [, barIndex] )

If we wanted to create an sma() of sma() we could do the following.

var xMyStudy = null;

function main() {
    if (xMyStudy == null) xMyStudy = sma(10, sma(5) );
    return xMyStudy.getValue(0);
} 

This creates a sma(10) of an sma(5) study.

Alternatively we could do it this way.

var xMyStudy1 = null;
var xMyStudy2 = null;
var bInit = false;  // initialize flag

function main() {
    if (bInit = false) {
        xMyStudy1 = sma(5);
        xMyStudy2 = sma(10, xMyStudy1);
        bInit = true;  // studies are now initialized
    }

    return xMyStudy2.getValue(0);
}