Using “round()” brings you to the closest integer. On an index quoting in thousands, rounding it doesn’t change its value a lot, but on a currency where pips are in decimals… for example EURUSD, an hh at 1.09613 when rounded would become = 1 and rounding ll = 1.09314 would make it = 1 too… so that’s a flat rectangle located at 1, which is why you couln’t see anything.