# Perspective Power Chart breakLine Property

**URL:** <https://forum.inductiveautomation.com/t/perspective-power-chart-breakline-property/43430>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [February 15, 2021, 8:06pm UTC](https://forum.inductiveautomation.com/t/perspective-power-chart-breakline-property/43430 "2021-02-15T20:06:13Z")\
**Posts on this page:** 1\
**Showing post:** 18

<div class="post-metadata">

**Author:** ![tupanaster](https://avatars.discourse-cdn.com/v4/letter/t/5daacb/32.png) [@tupanaster](https://forum.inductiveautomation.com/u/tupanaster)\
**Post date:** [August 9, 2022, 12:46pm UTC](https://forum.inductiveautomation.com/t/perspective-power-chart-breakline-property/43430/18 "2022-08-09T12:46:50Z")

</div>

> [@lisa.clark](#):
>
> Power chart interpolates between values so when a comm is down, we end up getting a slowly decreasing line when really it should’ve nulled out. Any updates? Ideas?

In 8.1.19 it still happens. I was wondering where I got all those changing values until I came across with posts about interpolation.

> [@Adriaan.leRoux](#):
>
> You need to set interpolation to “step after” and then set your historical logging to discrete, not analogue.
> 
> Something like that

You are right. I was reading this post a while ago.

> [@Power chart, are trends always interpolated?](https://forum.inductiveautomation.com/t/power-chart-are-trends-always-interpolated/40416/4):
>
> A prerequisite for using curvestepAfter, is that the measurement has to bee stored with a discrete Deadband Style: [image] If not you get these:

I'm not sure how it supposed to work because an analog sensor is not discrete and it also doesn't have the behavior that the power chart is drawing by default. I wonder why there aren't more posts about it

---

_[View the full topic](https://forum.inductiveautomation.com/t/perspective-power-chart-breakline-property/43430)._