# Ignition 8.3 - Timeseries chart - Live +T-1 tag trend

**URL:** <https://forum.inductiveautomation.com/t/ignition-8-3-timeseries-chart-live-t-1-tag-trend/111885>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [November 3, 2025, 4:53am UTC](https://forum.inductiveautomation.com/t/ignition-8-3-timeseries-chart-live-t-1-tag-trend/111885 "2025-11-03T04:53:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![n.karthikeyan](https://avatars.discourse-cdn.com/v4/letter/n/eb8c5e/32.png) [@n.karthikeyan](https://forum.inductiveautomation.com/u/n.karthikeyan)\
**Post date:** [November 3, 2025, 4:53am UTC](https://forum.inductiveautomation.com/t/ignition-8-3-timeseries-chart-live-t-1-tag-trend/111885/1 "2025-11-03T04:53:44Z")

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Hi Team, we have been trying to display both the live tag values [historized] and the t-1 value of the same tag as 2 different series on the same timeseries chart.

We have tried multiple techniques to accomplish the same but seem to hit a roadblock with every approach. The requirement is fairly simple:

1. Say a tag called total\_production exists on central which is constantly updated by a gateway script and is historized to a postgre db.
2. Now all we need is to display a TimeSeries chart which will
  1. Show a trend [series (0)] from the live (historized) tag
  2. Show another parallel trend [series (1)] which represents the **t-1** value of the same tag, where **t** could be in seconds/minutes/hours

I have attached a view.json of the view that contains one of such many attempts.

[view.json](https://forum.inductiveautomation.com/uploads/short-url/159DKr5qWWbyO3K8dm3E55MWUBy.json) (8.2 KB)