Knowing where the cursor is and the associated coordinate and data information is critical to really create highly functional finacial chart. It allows the developer to overlay order tools on the chart like trendlines, possibly even enables the end-user to place an order directly from chart. - Enhance cartesian chart interactivity by enabling the usage of TrackballInfo features without actually showing the trackball e.g. show the OHLC info in the top left corner of the chart (add mouse down/move events as well). - Enable scenarios that need to pass trackball info to other charts e.g. on chart #1 you want to show trackball info for chart #2 at the same time (knowing the trackball info and coordinates of each chart is critical to syncing the track info of another chart that may be below the main chart as stock would want to see the tracking info for all chart simultaneaously). Available in Q2 2015 Release.