If you have a lower study that you have to keep adjusting the size to keep it within the lower study window, try adding this study within the same lower study level, and this might be what you are looking for.
Code:
#Jmaxfl Lower Study Range Limiter
declare lower;
plot BlankPlot = Double.NaN;
BlankPlot.SetDefaultColor(Color.CURRENT);
BlankPlot.SetLineWeight(1);
BlankPlot.HideBubble();
BlankPlot.HideTitle();
#End Study
