Range Ratio

[zottl]

I would like to have an efs2 wich computes the following:

rsi(x,range(y)/range(z))

For example: a 10 period RSI of the ratio between a 2 day range relative to 20 day range

I'm not a great programmer so can anyone of you help please?

Thank you

[ckryza]

This should do it.

Chris

//External Variables
var grID                = 0;
var nBarCounter            = 0;
var nStudy1                = null;
var nStudy2                = null;
var nStudy3                = null;
var nStudy4                = null;
var aFPArray            = new Array();
var bInitialized        = false;


//== PreMain function required by eSignal to set things up
function preMain() {
var x;

    setPriceStudy(false);
    setStudyTitle("RSI of Range");
    setCursorLabelName("RofR", 0);
    setDefaultBarFgColor( Color.blue, 0 );
    setShowTitleParameters( false );

    grID = 0;
    
    //initialize formula parameters
    x=0; 
    aFPArray[x] = new FunctionParameter( "fDays1", FunctionParameter.NUMBER);
    with( aFPArray[x] ) {
        setName( "Range #1 (days)" );
        setLowerLimit( 1 );
        setUpperLimit( 99999 );
        setDefault( 2 );
    }  
    x++; 
    aFPArray[x] = new FunctionParameter( "fDays2", FunctionParameter.NUMBER);
    with( aFPArray[x] ) {
        setName( "Range #2 (days)" );
        setLowerLimit( 1 );
        setUpperLimit( 99999 );
        setDefault( 20 );
    }  
    x++; 
    aFPArray[x] = new FunctionParameter( "fRSI", FunctionParameter.NUMBER);
    with( aFPArray[x] ) {
        setName( "RSI Period" );
        setLowerLimit( 1 );
        setUpperLimit( 99999 );
        setDefault( 10 );
    }  

}

//== Main processing function
function main( fDays1, fDays2, fRSI ) {
var x;
var sSymb;
    
    //script is initializing
    if ( getBarState() == BARSTATE_ALLBARS ) {
        return null;
    }

    if ( bInitialized == false ) {
    
        sSymb = getSymbol() + ",D";
    
        nStudy1 = sma( Math.round( fDays1 ), efsInternal( "_range", sym( sSymb ) ) );
        nStudy2 = sma( Math.round( fDays2 ), efsInternal( "_range", sym( sSymb ) ) );
        nStudy3 = efsInternal( "_div", nStudy1, nStudy2 );
        nStudy4 = rsi( Math.round( fRSI ), nStudy3 );
    
    
        bInitialized = true;
    }

    //called on each new bar
    if ( getBarState() == BARSTATE_NEWBAR ) {
        
        nBarCounter++;
        
    }

    return( getSeries( nStudy4, 0 ) );

}


function _range( _sym ) {
    
    return( high(0)-low(0) );
    
}

function _div( _src1, _src2 ) {
var x, y;

    x = _src1.getValue(0);
    y = _src2.getValue(0);
    
    if ( x==null || y==null ) return( null );


    return( x/y );
    
} 

[zottl]

ckryza, thanks a lot!!!

regards