Does anyone have any suggestions for how I might approach something similar to the trackballs that can be found on both the Yahoo and Google financial charts? There is a little circle on the chart's series that follows the x coordinate of the mouse but the y coordinate of the series.
I have had a little mess about making a ChartElement that uses the findDataPoints method but I cannot seem to essentially ignore the mouse's y coordinate. Thanks in advance for any help/suggestions.
