If you display your dashboards on monitoring screens to track your performance indicators in real time, you can enable automatic data refreshing. To do this, open your dashboard, then open the calendar on the period "Today".
Tick the box "Enable automatic refreshing", then select the frequency of the refreshing.
Don't forget to save. Automatic refreshing is available for any period in real time: all day, or every 5, 10, 30 or 60 minutes.