# How can I compare two values in a same time series?

**URL:** <https://discuss.elastic.co/t/how-can-i-compare-two-values-in-a-same-time-series/66617>\
**Category:** Kibana\
**Created:** [November 19, 2016, 10:22am UTC](https://discuss.elastic.co/t/how-can-i-compare-two-values-in-a-same-time-series/66617 "2016-11-19T10:22:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Jeremie](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@Jeremie](https://discuss.elastic.co/u/Jeremie)\
**Post date:** [November 19, 2016, 10:22am UTC](https://discuss.elastic.co/t/how-can-i-compare-two-values-in-a-same-time-series/66617/1 "2016-11-19T10:22:11Z")

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I want to detect in a time series a quickly variation.  
To realize that I have to compare a value at t with it previous at t-1 or t+1 with t ???

Do you if it is possible with kibana?

Thanks in advance for your answer 😉

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [November 21, 2016, 2:36am UTC](https://discuss.elastic.co/t/how-can-i-compare-two-values-in-a-same-time-series/66617/2 "2016-11-21T02:36:48Z")

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You can do this with Timelion and the offset function.

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**Author:** ![Jeremie](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@Jeremie](https://discuss.elastic.co/u/Jeremie)\
**Post date:** [November 22, 2016, 3:36pm UTC](https://discuss.elastic.co/t/how-can-i-compare-two-values-in-a-same-time-series/66617/3 "2016-11-22T15:36:12Z")

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Thank you

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 20, 2016, 3:36pm UTC](https://discuss.elastic.co/t/how-can-i-compare-two-values-in-a-same-time-series/66617/4 "2016-12-20T15:36:16Z")

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