I think currently high chart support legend at single position, but I would like to display the legend on top as well as on bottom of the chart, because if the chart is bar chart and more values then user need to scroll the page again and again to view the legend.
So please let me know if it is already implemented or add to todo's list.
Multiple legends feature is currently planned and the implementation has already started.
Thanks for your request! Currently it's not supported.