Variation % in cursor window

[t34]

Hello, i would like to add a formula in the cursor window that write the variation in % of the bar between the opening and closing.

Like in this image:


Can you help me?
Thanks you

P.S: sorry for the bad langage i'm french

[dloomis]

this mightbe a good place to start

function preMain() {
setPriceStudy(true);
setStudyTitle("varPct");
setCursorLabelName("Var%", 0);
setDefaultBarStyle(PS_SOLID, 0);
setDefaultBarFgColor(Color.red, 0);
setDefaultBarThickness(1, 0);
setPlotType(PLOTTYPE_LINE, 0);
}

function main() {

x=-open(0)+close(0)
x=x/open(0)
return (x*100).toFixed(4);
}