I'm trying to create an indicator that shows the number of days since the last event has taken place. According to the help page,Indicator—Operations Dashboard for ArcGIS | ArcGIS , this should be possible. One of the example images is 'Days since last accident'.
What i cant figure out is how this value is calculated. Perhaps someone can point me in the right direction. My feature layer that has the data contains a date field so the information is there.