Substract 2 fields from different indexes and plot on Kibana

I have 2 indexes (sys-1-logs, sys-2-logs), I want to get the difference of count of both and plot on Kibana. Is this possible to do ? If yes then how to do it ?


I think that you have to use the Timelion visualisation in Kibana
i'll show you an example that you can test in your environnement.
i'm using as time field "TIMESTAMP" , according to your case you can use the timefield which matches with your indexes

Timelion expression

              q='message:*' )
             .legend(columns=2, position=nw))
             .title('Sub of counts')

Thanks a lot, it worked !!

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