# Trend Behavior Sometimes Not Showing Data

**URL:** <https://forum.inductiveautomation.com/t/trend-behavior-sometimes-not-showing-data/100489>\
**Category:** Ignition\
**Tags:** ignition81, vision\
**Created:** [January 6, 2025, 6:11pm UTC](https://forum.inductiveautomation.com/t/trend-behavior-sometimes-not-showing-data/100489 "2025-01-06T18:11:13Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![amarks](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/amarks/32/45610_2.png) [@amarks](https://forum.inductiveautomation.com/u/amarks)\
**Post date:** [January 6, 2025, 6:11pm UTC](https://forum.inductiveautomation.com/t/trend-behavior-sometimes-not-showing-data/100489/1 "2025-01-06T18:11:13Z")

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I have a trend set up for use with realtime or historical data, using Ignition's tag history module.

The value is 0 most of the times, but sometimes goes to 100. This value transitioned to 100 on 12/31. The issue I'm seeing is that if I'm "zoomed" in or out too far, even though that date is included, the data is not shown. What's even weirder is that the data doesn't show up unless I have 2, unrelated pens selected.

For instance, last 11 days selected, "Screw 1 Run" was 100 on 12/31 :

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/d/0d03fbcd3d9166b71271623fd6174493a894cd8b.png)  
select "Screw 2 Run", no other changes:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/a/ba82153eed6d7427d5205a7bb53103545171850f.png)  
zoom in to 10 days:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/e/ce45c09cc0b58062acd17dff2442a176fb49cb39.png)  
zoom out to 13 days (12 days still shows the data):  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/3/c3b297b95ac5a214a08547a027a14f264cdda300.png)

Using the historical mode instead of realtime mode produces the same results. I'm guessing that it has something to do with how the data points are retrieved. Here's my chart data resolution settings:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/3/a37ee8d64e595a75a9af933c0b4dbaa6fe77e0d4.png)

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<div class="post-metadata">

**Author:** ![amarks](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/amarks/32/45610_2.png) [@amarks](https://forum.inductiveautomation.com/u/amarks)\
**Post date:** [January 6, 2025, 6:14pm UTC](https://forum.inductiveautomation.com/t/trend-behavior-sometimes-not-showing-data/100489/2 "2025-01-06T18:14:15Z")

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Changing the resolution mode to "raw" seems to have fixed my issue. The data is now showing accurately. I'm guessing that this will come with a bit of a performance hit.

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**Author:** ![justinedwards.jle](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/justinedwards.jle/32/37854_2.png) [@justinedwards.jle](https://forum.inductiveautomation.com/u/justinedwards.jle)\
**Post date:** [January 9, 2025, 6:33am UTC](https://forum.inductiveautomation.com/t/trend-behavior-sometimes-not-showing-data/100489/3 "2025-01-09T06:33:15Z")

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> [@amarks](#):
>
> this will come with a bit of a performance hit

Interesting; I would have imagined the opposite since with raw data there is no work needed to fill in the blanks with additional datapoints.

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<div class="post-metadata">

**Author:** ![amarks](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/amarks/32/45610_2.png) [@amarks](https://forum.inductiveautomation.com/u/amarks)\
**Post date:** [January 9, 2025, 2:14pm UTC](https://forum.inductiveautomation.com/t/trend-behavior-sometimes-not-showing-data/100489/4 "2025-01-09T14:14:43Z")

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I don't know how the data works in the background, but with the previous settings only 300 data points were being loaded. Now, all of them are being loaded.