# Event Based Trending in Ignition **URL:** \ **Category:** Ignition\ **Tags:** ignition79, ignition80\ **Created:** [December 10, 2020, 7:54pm UTC](https://forum.inductiveautomation.com/t/event-based-trending-in-ignition/41401 "2020-12-10T19:54:07Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![nickboratyn](https://avatars.discourse-cdn.com/v4/letter/n/9d8465/32.png) [@nickboratyn](https://forum.inductiveautomation.com/u/nickboratyn)\ **Post date:** [December 10, 2020, 7:54pm UTC](https://forum.inductiveautomation.com/t/event-based-trending-in-ignition/41401/1 "2020-12-10T19:54:07Z")
Hi Guys, I am curious to know if anyone has done or if possible to create a chart based on an event happening out on the plant floor. Thank you for any input. ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [December 10, 2020, 7:55pm UTC](https://forum.inductiveautomation.com/t/event-based-trending-in-ignition/41401/2 "2020-12-10T19:55:28Z")
Example? ---
**Author:** ![nickboratyn](https://avatars.discourse-cdn.com/v4/letter/n/9d8465/32.png) [@nickboratyn](https://forum.inductiveautomation.com/u/nickboratyn)\ **Post date:** [December 10, 2020, 8:05pm UTC](https://forum.inductiveautomation.com/t/event-based-trending-in-ignition/41401/3 "2020-12-10T20:05:08Z")
For example, Whenever a batch is complete (which is a bit in the PLC that would go off) plot the batch number on the x-axis and the weight on the y-axis ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [December 10, 2020, 8:16pm UTC](https://forum.inductiveautomation.com/t/event-based-trending-in-ignition/41401/4 "2020-12-10T20:16:48Z")
I don’t see why not. A gateway tag change event script could call system.report.executeAndDistribute() to collect the recent data and send the report to a printer. Or email, whatever. ---
**Author:** ![nickboratyn](https://avatars.discourse-cdn.com/v4/letter/n/9d8465/32.png) [@nickboratyn](https://forum.inductiveautomation.com/u/nickboratyn)\ **Post date:** [December 10, 2020, 8:23pm UTC](https://forum.inductiveautomation.com/t/event-based-trending-in-ignition/41401/5 "2020-12-10T20:23:33Z")
I am sorry, I should clarify. I am working in ignition 8.1. I’m looking to build a XY Chart based on an event like I described previously. Most the charts in ignition currently seem to be mainly time-based. I’m wondering if you could use a chart and build the data based on an event. ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [December 10, 2020, 8:53pm UTC](https://forum.inductiveautomation.com/t/event-based-trending-in-ignition/41401/6 "2020-12-10T20:53:31Z")
It’s just data. Query for the last X events that you record in the DB. You _do_ have to _record_ the events and their associated data. A tag change event script can do that, too. Or a Transaction Group with your PLC tag as a trigger. ---
**Author:** ![nickboratyn](https://avatars.discourse-cdn.com/v4/letter/n/9d8465/32.png) [@nickboratyn](https://forum.inductiveautomation.com/u/nickboratyn)\ **Post date:** [December 10, 2020, 9:40pm UTC](https://forum.inductiveautomation.com/t/event-based-trending-in-ignition/41401/7 "2020-12-10T21:40:11Z")
So basically use the ignition historian to store my events using the tag change event script, then use create maybe a dataset of that data then bind that dataset to the graph. ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [December 10, 2020, 10:01pm UTC](https://forum.inductiveautomation.com/t/event-based-trending-in-ignition/41401/8 "2020-12-10T22:01:17Z")
> [@nickboratyn](#): > > use the ignition historian to store my events using the tag change event script If you use the historian, you don't need a tag change event script. But the historian won't save any associated data. For that you need a custom script, or use the SQL Bridge module's Transaction Group feature.