Control over the plotted limits for aggregated data on widgets

In widgets showing aggregated measurement data it is common (at least for me) to have part numbers which have different limits during the same time interval. It is not clear to me which limit is plotted, nor is it possible to control which limit to plot.

It would be nice to have some handles for adjusting the behavior, for instance if it could be possible to specify that I want the maximum limit occurring during the interval plotted as the limit. Or perhaps the minimum, the average or simply just having all of them plotted.