I'm new to ES and Kibana and I think these are amazing tools ! However, I'm having a hard time making calculus on several values. Here is my problem : I'm making a website for a brand that has several shops, and I need to make a dashboard for them where they can see a percentage of difference in sales values between one specific shop compare to all the other shops. So I really need to make a calculus like : (global sales values – shop sales values) / sales values * 100.
Anyway I've searched a lot but I cannot really find the best way to do it. I'd love to use Timelion but in the end I only need a number displayed, not a whole chart. Should I use a script ?
Thanks a lot in advance if you take the time to help me, and please excuse my poor english skills.