I have multiple charts with the same legend. I've hidden the legend in all but the first chart. I want the first chart's legend to control the rest of the charts' legends. The only way I've found to do this is to call "private" methods on the charts: _legendItemHover and _legendItemClick. This works pretty good, but the hover is a little bit off. When your mouse leaves a legend item it will un-highlight the item in the main chart, but not the secondary charts.
I've created a jsFiddle to demonstrate.
My guess is that the 'this' keyword is being used in the private method and that's throwing it off. I haven't done any research on that, just an educated guess. I'll be checking that now but wanted to see if anyone else had any other input.