Perhaps not something a lot of people would use but could something be added as an option to turn off the legend on a bar chart? It's already possible to do that for a trend chart so I was thinking this might not be too difficult as a consideration for a future version. 

To give a specific example of "why"..... One of our plants wanted to show the average temp per zone for the last 5 minutes using a bar chart. It would just be laid out as zone 1-14 and they can hover over a bar as well to see the caption so they don't really need the extra space taken by the legend. 

For now, I used an approach with multiple linear gauges but this was certainly not as easy to setup compared to the bar chart control.