//
// Puretick.com (TM)  Advancers - Decliners (c) 2006
// Author:  Jason Chan
//
// You may freely distribute this script, if you make changes just add to the comments.
//
// Comments:
//

function preMain() {
    setStudyTitle("Advancers/Decliners");
    setCursorLabelName("Adv", 0);
    setCursorLabelName("Decl", 1);
    setCursorLabelName("A - D", 2);
    setDefaultBarStyle(PS_SOLID, 0);
    setDefaultBarStyle(PS_SOLID, 1);
    setDefaultBarStyle(PS_DASHDOT, 2);
    setDefaultBarFgColor(Color.yellow, 0);
    setDefaultBarFgColor(Color.aqua, 1);
    setDefaultBarFgColor(Color.red, 2);
    setDefaultBarThickness(1, 0);
    setDefaultBarThickness(1, 1);
    setDefaultBarThickness(1, 2);
    setPlotType(PLOTTYPE_LINE, 0);
    setPlotType(PLOTTYPE_LINE, 1);
    setPlotType(PLOTTYPE_LINE, 2);
    setPriceStudy(false);    
}

function main() {
		
	nAdvancers = close(0, sym("$Adv") );
	nDecliners = close(0, sym("$Decl") );
	
	var nPlotAdvDecl = nAdvancers - nDecliners;

	return nPlotAdvDecl;
	// Just replace the return above if you want to plot all three
	// return new Array(nAdvancers, nDecliners, nPlotAdvDecl);
}