# Easy chart not Trending.. The whole line is moved when the value change

**URL:** <https://forum.inductiveautomation.com/t/easy-chart-not-trending-the-whole-line-is-moved-when-the-value-change/27969>\
**Category:** Ignition\
**Created:** [September 3, 2019, 1:10pm UTC](https://forum.inductiveautomation.com/t/easy-chart-not-trending-the-whole-line-is-moved-when-the-value-change/27969 "2019-09-03T13:10:04Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![gilles.levesque](https://avatars.discourse-cdn.com/v4/letter/g/919ad9/32.png) [@gilles.levesque](https://forum.inductiveautomation.com/u/gilles.levesque)\
**Post date:** [September 3, 2019, 1:10pm UTC](https://forum.inductiveautomation.com/t/easy-chart-not-trending-the-whole-line-is-moved-when-the-value-change/27969/1 "2019-09-03T13:10:04Z")

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Hello  
I have an easy chart on a process that is acting weird. When a value change, instead of trending, the whole trend lines move up or down accordingly with the value. No mather the time i select in realtime, it always display straight lines instead of trends. Same thing in historical mode.

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**Author:** ![grietveld](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/grietveld/32/6984_2.png) [@grietveld](https://forum.inductiveautomation.com/u/grietveld)\
**Post date:** [September 3, 2019, 2:37pm UTC](https://forum.inductiveautomation.com/t/easy-chart-not-trending-the-whole-line-is-moved-when-the-value-change/27969/2 "2019-09-03T14:37:37Z")

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How is the pen configured? Is there history being saved for that tag? Or are you just grabbing the live value only?

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**Author:** ![gilles.levesque](https://avatars.discourse-cdn.com/v4/letter/g/919ad9/32.png) [@gilles.levesque](https://forum.inductiveautomation.com/u/gilles.levesque)\
**Post date:** [September 3, 2019, 2:38pm UTC](https://forum.inductiveautomation.com/t/easy-chart-not-trending-the-whole-line-is-moved-when-the-value-change/27969/3 "2019-09-03T14:38:32Z")

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Each tag are historised

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<div class="post-metadata">

**Author:** ![gilles.levesque](https://avatars.discourse-cdn.com/v4/letter/g/919ad9/32.png) [@gilles.levesque](https://forum.inductiveautomation.com/u/gilles.levesque)\
**Post date:** [September 3, 2019, 5:44pm UTC](https://forum.inductiveautomation.com/t/easy-chart-not-trending-the-whole-line-is-moved-when-the-value-change/27969/4 "2019-09-03T17:44:48Z")

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In fact it was working then it stopped working a week ago or so…

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**Author:** ![gilles.levesque](https://avatars.discourse-cdn.com/v4/letter/g/919ad9/32.png) [@gilles.levesque](https://forum.inductiveautomation.com/u/gilles.levesque)\
**Post date:** [September 3, 2019, 6:03pm UTC](https://forum.inductiveautomation.com/t/easy-chart-not-trending-the-whole-line-is-moved-when-the-value-change/27969/5 "2019-09-03T18:03:43Z")

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Ok Problem solved… for now… Not enough space on SQL express server. I deleted old databases and set the pruning at 6 month.