get the mouse position on the chart
as you can see at http://www.flotcharts.org/flot/examples/interacting/index.html
(hover your mouse on the graph and look at bottom: show mouse position)
you can have mouse coordinates on the graph,
today in highcharts i can only have the mouse coordinates on points,
but i want to have a feature that can allow to get the coordinates of the mouse independently of the drawed points.
it would be great!
Using Highcharts' Pointer.normalize method, you can apply mouse events directly to the container: http://jsfiddle.net/highcharts/YQ6Bt/.
This is an undercommunicated feature, we will create better documentation it asap.