Show top 5 in reports

Hi all,

I have a a bar chart with all my products which shows the total sales price for all my customers. Is there any way I can make it show a top 5, on which products that have the highest total sales price?

I can see that you can't do it using Source option.
Have asked Knack support and currently there are no options to show a top 5.

Use Chart Source option to filter the data you like to show.