I'd love to see an option added to sort the legend of graphs by the value that is being represented. This way the items with the largest value in the graph are displayed top down in the legend. 

For example, let's say I have a large sales team and I create a stacked bar chart showing the last 4 months of the total value of deals closed and I have it colored by the owner of the deal to show who contributed how much to the total. 

Both the legend and the colors in the bar chart are listed/displayed alphabetically or manually so when my top earners are those whose names are at the end and beginning of the alphabet, some are left off the chart legend, which at a glance makes it look like they aren't contributing. 

Additionally, when there is a large list, finding and matching the color of the larger block to the correct person in the legend is difficult and would be much easier if both the colors and legend could be sorted by the value on the Y axis.