Sparkline is a feature in MS Excel that enables you to see
trends within your data at a glance. Once the procedure is followed to create a
Sparkline, you can change the Sparkline’s data source. To do this, you need to
select the Sparkline cell and go to the Sparkline tools tab. You can proceed to
click on Design - Sparkline - Edit Data - Edit group location and data/ Edit
Single Sparkline’s Data option.