andyhmltn, try FusionCharts or HighCharts instead. I have had good experience with FusionCharts till now and it also has the features(hover/tap events & legends) that you are looking for. Feel free to mail me if you get stuck somewhere. Can't say much about HighCharts as I am yet to experiment with all its features. But everyone here seems to love them, so you can find good support for it as well.