function preMain() {

    setPriceStudy(true);
    setStudyTitle("X Line");
    setCursorLabelName("X",0);
    setCursorLabelName("AvgX",1);
    setDefaultBarFgColor(Color.brown,0);
    setDefaultBarFgColor(Color.yellow,1);
    setPlotType(PLOTTYPE_LINE,0);
    setPlotType(PLOTTYPE_LINE,1);
    setDefaultBarThickness(1,0);
    setDefaultBarThickness(2,1);
}

function main() {
var X = 0;
var AvgX = 0;

X = close () - ema (30);
AvgX = ema (14, X);

return (X, AvgX);

}