Average value for charts
I think it would be nice to see the average value in charts. This could either be an (optional?) horizontal line, or simply a number written somewhere on the graph (perhaps under the dates in the top left corner).
I know you can get the average value over a time period in the nutrition report, however, it would be much more convenient if this information was available on the charts, so I don't have to flip back and forth between the charts and the nutrition report.