# Tag Historian configuration or Easy Chart configuration?

**URL:** <https://forum.inductiveautomation.com/t/tag-historian-configuration-or-easy-chart-configuration/42719>\
**Category:** Ignition\
**Created:** [January 28, 2021, 9:00pm UTC](https://forum.inductiveautomation.com/t/tag-historian-configuration-or-easy-chart-configuration/42719 "2021-01-28T21:00:21Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Matrix\_Engineering](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matrix_engineering/32/19781_2.png) [@Matrix\_Engineering](https://forum.inductiveautomation.com/u/Matrix_Engineering)\
**Post date:** [January 29, 2021, 9:37pm UTC](https://forum.inductiveautomation.com/t/tag-historian-configuration-or-easy-chart-configuration/42719/2 "2021-01-29T21:37:41Z")

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> [@Easy chart interpolates to zero forever](http://forum.inductiveautomation.com/t/easy-chart-interpolates-to-zero-forever/35690):
>
> [WhatsApp Image 2020-06-16 at 10.09.10] I am using ignition 8.05 and we have a easy chart component that is showing presssure values. When a manual valve is shut the ready of the pressure transmitter is zero. the question is why is the easy chart showing an interpolation from the last value to zero rather then having a constant zero line?

Some advice in this thread, might help

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