Popupon custom tooltip

[User (Legacy)]

Hi, 

I'd like to display messages in popup with "custom" informations for 

each bar in my graph (i.e. other than "Value (%v)", "sum (%t)", ...) in the 

tooltip. 

Is there a way to get the "index" of the "onmouseovered" bar in my Serie. 

I tried to use "%x" - Show X Value: 

it doesn't return any value ? If it do, is it the bar "index" ? 

Is ther another way to do such a thing ? 

Thanks, 

    Christophe.