Create a bar chart with differences.

In the case of bar charts, absolute or relative differences between the charts can be displayed via the URL:

The following extension must be integrated into the URL for this:
Relative difference: &diff0=1
Absolute difference: &diff0=2

The 0 stands for the number of the chart (0 = 1st chart, 1 = 2nd chart in the dashboard, etc.), which can be used to access the respective chart.
The addition to the URL can be made at any point, e.g. at the end. After refreshing the page, the differences appear in the charts and can be saved.