/*********************************************************************************

Dragonbreath aka Geoff was here

**********************************************************************************/

function preMain() {
        setPriceStudy(true);
        setStudyTitle("Gap Zones - REQUIRES 900 to 1603 Time Template!");
        setCursorLabelName("PD-O", 0); // Today Open
        setCursorLabelName("TD-O", 1); // Prev Open
	
        setDefaultBarStyle(PS_SOLID, 0); 
        setDefaultBarStyle(PS_SOLID, 1); 
	
        setDefaultBarFgColor(Color.blue, 0);		
        setDefaultBarFgColor(Color.blue, 1);	
	
        setDefaultBarThickness(2, 0); 
        setDefaultBarThickness(4, 1); 
	
        setPlotType(PLOTTYPE_FLATLINES, 0); 
        setPlotType(PLOTTYPE_FLATLINES, 1);	
    
}

var bInit = false;
var xOpen = null;
var xHigh  = null;
var xLow   = null;
var xClose = null; 

function main() {
	
	if(isMonthly() || isWeekly() || isDaily())
    return;
    
    if(bInit == false){
        xOpen  = open(inv(453));
        xClose = close(inv(453)); 
        bInit = true;
    }
    
    
    var vOpen  = getSeries(xOpen);
    var vClose = xClose.getValue(-1); 
    if(vOpen == null || vClose == null)
    return;
	
    gap=(vOpen-vClose);
    gap=rnd(gap,2);
    
    if (gap > 0) drawTextPixel(50, 15, "|  GAP UP: +"+gap+"  |", Color.RGB(255,255,255), Color.RGB(0,0,255), Text.ONTOP, "Arial", 20, "Gap");
    if (gap < 0) drawTextPixel(50, 15, "|  GAP DOWN: "+gap+"  |", Color.RGB(255,255,255), Color.RGB(255,0,0), Text.ONTOP, "Arial", 20, "Gap");

drawTextAbsolute (-5, vOpen, "*Gap Boundary*", Color.black, Color.white, Text.ONTOP | Text.CENTER, "Courier", 8, "TodayOpen" );
drawTextAbsolute (-5, vClose, "*Gap Boundary*", Color.black, Color.white, Text.ONTOP | Text.CENTER, "Courier", 8, "PrevClse" );

	
	return new Array (vOpen,vClose);
}


//==rnd will round to N digits (thanks TRO for rounding code)

function rnd(value, N) {

    var n;

    var mult=1;

    for(n=0;n<N;n++) mult*=10;

    value*=mult;

    return Math.round( value,N)/mult;

}