Would it be possible to add a performance 'bar' for charts like bar and column charts. This 'bar' is really just a line, with arrows on the top and bottom, that indicates the higher and lower performers (assuming you passed in a sorted list of data). This 'bar' would sit beside the chart (for bar charts) or underneath the chart (for column charts).

You can see an image of this enhancement request next to the bar chart in this link https://github.com/highslide-software/highcharts.com/issues/2539 (sorry for posting an enhancement request on GitHub)