pail1217 wrote: Sat Feb 18, 2023 7:56 am ah ok, I noticed something else, if you increase the zone fill bars, the error occurs again. Then the upper and lower level color is also missing

Try increasing the fill bars to an an amount only equal to or less than max bars in chart or history. Might need to add that in user comments. Only using 1000 bars in history and on chart so put fill bars at 1000 and got below result.