With these charts you can choose to compare your data to last time period, e.g. last month or last year. Select 'Compare to last time period':
Please be aware that this comparison will only work if your widget is grouped by 'One Group' (meaning all teams and all users).
Here is an example of how cool it is to have a chart showing the number of e.g. sales per day, compared with last month:
But look at the chart below; it actually looks much cooler - as you easily can see - if you are behind or on track.
You only need to check 'Accumulate', when you edit the widget.