Hi,
I am trying to get a StackColumn Chart to position tooltips over the entire stack no matter which series I roll over. I am using the formatter but am having trouble when rolling over a series other than 0, getting the coordinates to be able to position the tooltip affectively. I know I can fix the plotY value near the top but not dynamically for shortened stacked series (it ends up being too far away in many cases or overlapping when the series gets larger). Is there a way to add up the individual series heights and subtract the chart height?