# Power Chart Default Interpolation

**URL:** <https://forum.inductiveautomation.com/t/power-chart-default-interpolation/114585>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [March 20, 2026, 3:58am UTC](https://forum.inductiveautomation.com/t/power-chart-default-interpolation/114585 "2026-03-20T03:58:36Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![vappadoo](https://avatars.discourse-cdn.com/v4/letter/v/b5a626/32.png) [@vappadoo](https://forum.inductiveautomation.com/u/vappadoo)\
**Post date:** [March 20, 2026, 3:58am UTC](https://forum.inductiveautomation.com/t/power-chart-default-interpolation/114585/1 "2026-03-20T03:58:36Z")

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Hi,

I was wondering if it is possible to make the interpolation on the powercharts "curveStepAfter" by default instead of "linear". So basically, if I add a new pen, the interpolation should be curveStepAfter automatically.

Thanks

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**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\
**Post date:** [March 20, 2026, 4:45am UTC](https://forum.inductiveautomation.com/t/power-chart-default-interpolation/114585/2 "2026-03-20T04:45:34Z")

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This would certainly prevent a lot of questions from operators trying to work out why the trends don’t match reality, but unfortunately, at least for now, there’s no way to change the default option. You could force it via a change script though. Although, don’t you want curveStepAfter?

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<div class="post-metadata">

**Author:** ![vappadoo](https://avatars.discourse-cdn.com/v4/letter/v/b5a626/32.png) [@vappadoo](https://forum.inductiveautomation.com/u/vappadoo)\
**Post date:** [March 20, 2026, 5:02am UTC](https://forum.inductiveautomation.com/t/power-chart-default-interpolation/114585/4 "2026-03-20T05:02:38Z")

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Ahh all good. Yes we want curveStepAfter. I have edited the post.

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<div class="post-metadata">

**Author:** ![vappadoo](https://avatars.discourse-cdn.com/v4/letter/v/b5a626/32.png) [@vappadoo](https://forum.inductiveautomation.com/u/vappadoo)\
**Post date:** [June 17, 2026, 6:50am UTC](https://forum.inductiveautomation.com/t/power-chart-default-interpolation/114585/5 "2026-06-17T06:50:46Z")

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Hi, do you have any examples of how to do this? I tried to force it though a change script, but I cannot seem to access the parameters through scripting. Thanks

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**Author:** ![MMaynard](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mmaynard/32/3366_2.png) [@MMaynard](https://forum.inductiveautomation.com/u/MMaynard)\
**Post date:** [June 17, 2026, 2:13pm UTC](https://forum.inductiveautomation.com/t/power-chart-default-interpolation/114585/6 "2026-06-17T14:13:45Z")

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If every pen is going to have it set to that then a quick thing would be to put a change script on the power chart pens array and just set it for all the pens under it.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/c/0cba4a4db7cfe7e612c72bab5bd6e038c6ec8552.png)