hi - 

made a chart from a table with highcharts. my goal is to display a reference / compare line like the one you can see here https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/stock/plotoptions/series-compare-percent/ but for the data plotted in my chart. 

i tried using the callback functionality, but I wasn't able to do what I wanted. the callback speaks to the right chart, but I can't use highstock at all - is that something you can do with wpdatatable? see the issue is that highstock includes highchart so if we try to add highstock it says "already loaded". also, once I do get that loaded, I am not sure I will be able to do what I need — which is basically a relative percentage line that updates when the user zooms to see the variations of a specific line series. 

any ideas? 

thanks!