Showing baseline result relative to a other results

I have a line chart that plots results for a bunch of tests. One of the tests is a "baseline" result. Each result includes a value that indicates the baseline to compare with. I currently have a query that looks something like: | stats perc50("Variables.Xmetrics.totalCpuUtilizationSeconds") as "50th Percentile" by "Variables.deviceBuild" How can I modify the query to plot the baseline result? There is a variable called: "Variables.baselineBuild", so I can search for the baseline result and get its Variables.Xmetrics.totalCpuUtilizationSeconds. I just don't know SPL well enough to wrap my head around how I can do this secondary query and then reference it when drawing the chart UI element.