How do I set autoscaling for the maximum data point only?
Autoscaling affects both ends of the scale as well as the intermediate markers. It isn’t possible to “auto” just one marker. You can write to an attribute node to set any of these individually; so you can turn off autoscaling, preview the data being wired to the chart and update the attributes when needed. If you have LV5.1, the picture control examples contain VIs that do autoscaling for graphs. If your data is always above zero, then another trick would be to make a second plot that is always zero. You can even make the plot be the background color or transparent; so it won’t even show up. This doesn’t work if the idea is to ignore negative values when scaling, but can always be used to expand the scales.