Hi,

in your code is bug:

function wcl()
{

var weight = 1;
var high = priceHigh();
var low = priceLow();
var close = priceClose();

var calc = high+low+weight*close/(2+weight);
return calc; <--- return var calc

vars wclS=series(wcl()); <- this never going - is after return, this must by in FCE run()

}

your question:
in the FCE run:

set(PLOTNOW);
vars wclS=series(wcl());
..
plot("WCL indi ", wclS, NEW+LINE, BLUE);

or in main window
plot("WCL indi ", wclS, MAIN+LINE, BLUE);