# Charts render incorrectly when querying for longer time intervals

**URL:** <https://forum.inductiveautomation.com/t/charts-render-incorrectly-when-querying-for-longer-time-intervals/102937>\
**Category:** Ignition\
**Created:** [February 26, 2025, 8:47pm UTC](https://forum.inductiveautomation.com/t/charts-render-incorrectly-when-querying-for-longer-time-intervals/102937 "2025-02-26T20:47:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Troy](https://avatars.discourse-cdn.com/v4/letter/t/85f322/32.png) [@Troy](https://forum.inductiveautomation.com/u/Troy)\
**Post date:** [February 26, 2025, 8:47pm UTC](https://forum.inductiveautomation.com/t/charts-render-incorrectly-when-querying-for-longer-time-intervals/102937/1 "2025-02-26T20:47:20Z")

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Below are 2 easy chart screenshots, all default settings, I just dragged the tags from the tag browser onto the chart.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/1/e1586ad9d5bd4144e779929ee0ae0f6f842d5a71.png)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/c/fc381b8a353bce4d36fd747039a244759835b0a7.png)

In the third screenshot, you'll see that I can pull up several days worth of data as long as the data is from before Feb 12th, where the data turns into a straight line (which goes away when I turn off "Allow Tag History Interpolation").

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/9/996fb57f6ee918d5697ea293ec25a30c359b019a.png)

Has anyone dealt with this before?

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<div class="post-metadata">

**Author:** ![David\_Stone](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/david_stone/32/79749_2.png) [@David\_Stone](https://forum.inductiveautomation.com/u/David_Stone)\
**Post date:** [February 26, 2025, 10:33pm UTC](https://forum.inductiveautomation.com/t/charts-render-incorrectly-when-querying-for-longer-time-intervals/102937/2 "2025-02-26T22:33:34Z")

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This normally means there is simply no history since the start of the straight line, did you change deadband or tag history settings?

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<div class="post-metadata">

**Author:** ![Troy](https://avatars.discourse-cdn.com/v4/letter/t/85f322/32.png) [@Troy](https://forum.inductiveautomation.com/u/Troy)\
**Post date:** [February 27, 2025, 4:05pm UTC](https://forum.inductiveautomation.com/t/charts-render-incorrectly-when-querying-for-longer-time-intervals/102937/3 "2025-02-27T16:05:08Z")

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I have not made any changes.

There is tag history data, I can see it when I reduce the time interval (or zoom in). It just thinks there isn't any when trying to display data after the 12th. I thought maybe the queries were timing out or something but for older data I can query for a week's worth of data with no issues.