# Chart Abnormality

**URL:** <https://forum.inductiveautomation.com/t/chart-abnormality/23847>\
**Category:** Ignition\
**Created:** [April 4, 2019, 12:43pm UTC](https://forum.inductiveautomation.com/t/chart-abnormality/23847 "2019-04-04T12:43:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![carolineuchoa.estuda](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@carolineuchoa.estuda](https://forum.inductiveautomation.com/u/carolineuchoa.estuda)\
**Post date:** [April 4, 2019, 12:43pm UTC](https://forum.inductiveautomation.com/t/chart-abnormality/23847/1 "2019-04-04T12:43:00Z")

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Hello,

My Historical Chart is presenting some peaks that should not be there (as image below). The data is correct, but the chart just don’t seem to work correctly. It was not happening before. Anyone knows what that could be?

Thanks!

![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/3/385b0a253e332ed00d1bc403e0e131609bb9c9a1.png)

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**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\
**Post date:** [April 4, 2019, 3:41pm UTC](https://forum.inductiveautomation.com/t/chart-abnormality/23847/2 "2019-04-04T15:41:18Z")

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With my psychic ability and your overwhelming amount of information I see that…  
Oh, never mind…🙄

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<div class="post-metadata">

**Author:** ![carolineuchoa.estuda](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@carolineuchoa.estuda](https://forum.inductiveautomation.com/u/carolineuchoa.estuda)\
**Post date:** [April 4, 2019, 4:43pm UTC](https://forum.inductiveautomation.com/t/chart-abnormality/23847/3 "2019-04-04T16:43:00Z")

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Thanks for the polite and useful answer.

It was a scanclass validation problem.