# XY Chart adding in a USL and LSL **URL:** \ **Category:** Ignition\ **Tags:** perspective\ **Created:** [October 30, 2023, 7:35pm UTC](https://forum.inductiveautomation.com/t/xy-chart-adding-in-a-usl-and-lsl/81194 "2023-10-30T19:35:15Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Steve\_Coughlin](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@Steve\_Coughlin](https://forum.inductiveautomation.com/u/Steve_Coughlin)\ **Post date:** [October 30, 2023, 7:35pm UTC](https://forum.inductiveautomation.com/t/xy-chart-adding-in-a-usl-and-lsl/81194/1 "2023-10-30T19:35:15Z")
I am attempting to add in a static USL and LSL value into an XY chart. I can't figure out how to overlay the USL/LSL value onto the existing series of data, it seems to add the value in as a totally separate series of data. ![SPC_USL_1](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/d/dd23b2f4b1e864c01523145df7b32d05463db299.png) ![SPC_USL_2](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/f/ef404015775e1f4f8ce64a0f87b52e321b97af3e.png) Any help is appreciated. Thanks! ---
**Author:** ![Tim\_Carlton](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/tim_carlton/32/52835_2.png) [@Tim\_Carlton](https://forum.inductiveautomation.com/u/Tim_Carlton)\ **Post date:** [October 30, 2023, 7:58pm UTC](https://forum.inductiveautomation.com/t/xy-chart-adding-in-a-usl-and-lsl/81194/2 "2023-10-30T19:58:55Z")
Posting code is more useful than screen shots, though sometimes both code and screenshots are helpful. That said, from what I can see: - you have one plot - you have two series (lines drawn based on x,y data) on that plot - you have two axis on the plot. Both are on the left. - - the first series (series[0]) is plotted against axis[0] - - the second series (series[1]) is plotted against axis[1] From your description, what you want is probably - one plot - three series (measurement, USL, LSL) - one axis, with all three series plotted against the same axis (axis[0]) You have explicitly instructed Perspective to plot series[1] on axis[1] by selecting USL as the yAxis. ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/7/57cd74a6eea2330a204d6d96a235e1173a77935a.png) Change that to `yAxis: default` (or whatever you named axis[0]) and see if that is what you were expecting. ---
**Author:** ![Steve\_Coughlin](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@Steve\_Coughlin](https://forum.inductiveautomation.com/u/Steve_Coughlin)\ **Post date:** [October 30, 2023, 8:05pm UTC](https://forum.inductiveautomation.com/t/xy-chart-adding-in-a-usl-and-lsl/81194/3 "2023-10-30T20:05:09Z")
Hi Tim, Forgot to mention that this data is being pulled from a SQL query, so there's no code used. ![png_Igni_q](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/9/69a974cadf896fc495eb841aaf30c5ba95bc3ac7.png) You were correct though, I hadn't set the yAxis to share the same yAxis as my other data, ugh. Thanks!!! ---
**Author:** ![Tim\_Carlton](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/tim_carlton/32/52835_2.png) [@Tim\_Carlton](https://forum.inductiveautomation.com/u/Tim_Carlton)\ **Post date:** [October 30, 2023, 8:08pm UTC](https://forum.inductiveautomation.com/t/xy-chart-adding-in-a-usl-and-lsl/81194/4 "2023-10-30T20:08:59Z")
> [@Steve\_Coughlin](#): > > Forgot to mention that this data is being pulled from a SQL query, so there's no code used For future reference, right click on the chart and `copy`. That will serialize the chart properties as JSON. Paste them here in an expandable section (search the internet for "expandable section markdown"). ---
**Author:** ![Steve\_Coughlin](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@Steve\_Coughlin](https://forum.inductiveautomation.com/u/Steve_Coughlin)\ **Post date:** [October 30, 2023, 8:09pm UTC](https://forum.inductiveautomation.com/t/xy-chart-adding-in-a-usl-and-lsl/81194/5 "2023-10-30T20:09:52Z")
Ahh good tip! 🙂