# Trend updating time

**URL:** <https://forum.inductiveautomation.com/t/trend-updating-time/37519>\
**Category:** Ignition\
**Created:** [August 7, 2020, 9:15pm UTC](https://forum.inductiveautomation.com/t/trend-updating-time/37519 "2020-08-07T21:15:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sammyjoe.gingras](https://avatars.discourse-cdn.com/v4/letter/s/54ee81/32.png) [@sammyjoe.gingras](https://forum.inductiveautomation.com/u/sammyjoe.gingras)\
**Post date:** [August 7, 2020, 9:15pm UTC](https://forum.inductiveautomation.com/t/trend-updating-time/37519/1 "2020-08-07T21:15:52Z")

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Hi, did somebody know what is the time between two value in a trend? I would like to know what is the lapse of time between the first point (value) of a curve and the second point in a Trend…Because I want to know how much data i got in the average section of the trend.

Also, is there a way to change the number of data for a certain lapse of time?

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**Author:** ![franklepkowski](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/franklepkowski/32/4808_2.png) [@franklepkowski](https://forum.inductiveautomation.com/u/franklepkowski)\
**Post date:** [August 8, 2020, 2:15am UTC](https://forum.inductiveautomation.com/t/trend-updating-time/37519/2 "2020-08-08T02:15:17Z")

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sammyjoe,

I am pretty sure you can use the easy chart extension functions to capture data in x trace mode into some memory tags from two different points in time on the chart and calculate from there. I have done this to calculate Delta PV over the span of time selected.

Frank