You can view the full run history of the script, by clicking on the Run History tab. This will provide you with the run history across the entire project.
The run history screen provides all historical run details on the summary grid and two charting widgets are also shown to provide summary views of your data across the project.
...
Here you can select to view a previous run, delete a run, change select different runs on the grid to change the display of the widgets.
...
Two charting widgets are provided as standard, the Status Over Time widget and the Statuses Group By Widget. The type of widgets to display are not configurable. From the Run History screen for script assignment. The Status Grouped By widget is configurable and you change chose a date or field parameter to group.
The underlying data for the widgets is driven by the grid. You can click on selected runs to change the data represented on the charting widgets.
Configurable options are available for the Status Over Time widget when viewing the run history for the entire Execution Set folder.
...
To view the previous run double click on the run in the grid to open the historical run.
Selecting a few runs will change the data that is charted on the widgets.