# Kibana: how to calculate a delta metric in table visualization?

**URL:** <https://discuss.elastic.co/t/kibana-how-to-calculate-a-delta-metric-in-table-visualization/73646>\
**Category:** Kibana\
**Created:** [February 2, 2017, 9:37am UTC](https://discuss.elastic.co/t/kibana-how-to-calculate-a-delta-metric-in-table-visualization/73646 "2017-02-02T09:37:51Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Bargs](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bargs/32/5429_2.png) [@Bargs](https://discuss.elastic.co/u/Bargs)\
**Post date:** [February 13, 2017, 3:48pm UTC](https://discuss.elastic.co/t/kibana-how-to-calculate-a-delta-metric-in-table-visualization/73646/4 "2017-02-13T15:48:37Z")

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Hi @asp

Perhaps I've misunderstood what your data looks like. You mentioned:

> Each minute I get the statistics, how many transactions a service has processed since start of the service.  
> So it is a steadily growing number until the next restart of the server.

If the transaction count field is always increasing, won't the minimum and maximum count be the first and last events by definition, except perhaps after a restart?

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