Assume for example that the user wants to
zoom in to see the most recent data on a chart.
If they first click on some point within the chart,
then sweep to the right to define the range selection,
if they point *past* the final data point the range-selection fails to happen.
Now one might say, "well just don't go past the final data point",
however, with many data points it's not easy to select the exact final data point.
A more user-friendly behavior would be to have the range selection
automatically stop at the final chart point.
Try it here:
http://www.highcharts.com/demo/?example ... me=default
