# Display Unique Chart Pens Depending on Client ID

**URL:** <https://forum.inductiveautomation.com/t/display-unique-chart-pens-depending-on-client-id/10890>\
**Category:** Ignition\
**Created:** [December 8, 2015, 4:19pm UTC](https://forum.inductiveautomation.com/t/display-unique-chart-pens-depending-on-client-id/10890 "2015-12-08T16:19:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dsarnes](https://avatars.discourse-cdn.com/v4/letter/d/74df32/32.png) [@dsarnes](https://forum.inductiveautomation.com/u/dsarnes)\
**Post date:** [December 8, 2015, 4:19pm UTC](https://forum.inductiveautomation.com/t/display-unique-chart-pens-depending-on-client-id/10890/1 "2015-12-08T16:19:10Z")

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I am needing help displaying a unique set of pens on a chart depending on which client is running. I have each client assigning a unique ID, depending on the PC hostname. Each client gathers data and sends that data to an OPC tag that logs it in historian.  
My issue seems to be that the chart needs data from a table to display pen data. How do I display a set of pens based on my client ID?

Hope this makes sense.

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**Author:** ![diat150](https://avatars.discourse-cdn.com/v4/letter/d/a587f6/32.png) [@diat150](https://forum.inductiveautomation.com/u/diat150)\
**Post date:** [December 8, 2015, 10:56pm UTC](https://forum.inductiveautomation.com/t/display-unique-chart-pens-depending-on-client-id/10890/2 "2015-12-08T22:56:47Z")

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are you using ignitions built in tag history or logging the data in a table separate from the Ignition tag history?