ref()

ref()

ref( barIndex )

The ref() function allows you to retrieve prior values for a built-in study (or studies). If multiple return values are being used then the ref() function will return its results in an array.

Parameters

Usage

var study1        = null;

var study2        = null;

var bInit                = false;

var BarCntr        = 0;

function preMain() {

       setPriceStudy(true);

}

function main() {

var nMA1;

var nMA2;

var myRef;

var myValue1, myValue2;

       if ( bInit==false ) {

               study1 = sma( 10 );

               study2 = sma( 20 );

               bInit=true;

       }

       nMA1 = study1.getValue(0);

       nMA2 = study2.getValue(0);

       if (getBarState() == BARSTATE_NEWBAR) {

               BarCntr += 1;

       }

       /*** BarCntr logic ***/

       // We're using 20 because our longest sma() requires a minimum of 20 bars.

       if (BarCntr > 20) {

               //myRef will now contain the two MA values from the prior bar.

               //they will be in an array so we need to treat them as such

               myRef = ref(-1);

               if ( myRef != null ) {

                       myValue1 = myRef[0];

                       myValue2 = myRef[1];

               }

       }

       // Open the Formula Output Window from the tools menu to view the values of myRef.

       if (BarCntr > 20) {

               debugPrintln("Bar Index: " + getCurrentBarIndex() + " myValue1= " + myValue1 + " myValue2= " + myValue2);

       }

       return new Array( nMA1, nMA2 );

}