I have indexed documents containing a person's "arrivalTime" and "departureTime". What I'd like to show is the number of people in attendance at a given time, so for each bucket, it would display a count of all documents where (arrivalTime <= Bucket From:)
(departureTime does not exist or > Bucket To:)
Is this possible in Kibana? Filters? But how would I reference the bucket time in a filter query?
I'd be looking at implementing in a either a Line chart of Vertical Column chart with Date Histogram X Axis.