setBar(Bar.FgColor, ...) problems ?

[cls]

I need to change the color of a previously-displayed price bar.
I have tryed with setBar(Bar.FgColor, ...) but don't work.

For instance, this code would have to change the color to green of all bars:

function preMain() {
setPriceStudy(true);
setColorPriceBars(true);
}
function main(){
setBar(Bar.FgColor, -1, 0, Color.green);
return true;
}

but don´t work. However, this code with SetBar(Bar.BgColor, ...) work fine:

function main(){
setBar(Bar.BgColor, -1, 0, Color.green);
return true;
}

I don't understad it. Could you help me? Thanks very much.

[ACM]

cls
At this time EFS can only paint the price bar that is being processed. It cannot paint prior price bars.
Alex