You'll need to add your custom tooltip column after each column that
corresponds to a series that you want the custom tooltip to apply to.
Alternatively, I believe you can aggregate all your tooltips into one
'category' tooltip. Use the focusTarget: 'category' option. See the
"London Olympics
I am using Google line chart for developing the graph. I need to show
custom tooltip in which i need to render html code. But the custom tooltip
only work on single line in graph, but hovering on another lines it show
default tool tip provided by google chart. I wanted to show html custom
tool
