When this mode is on, information should be displayed for all data points in a given category (as opposed to displaying the closest points taken from different categories).

When the CartesianPlotBand annotation is bound to the vertical axis its 'From' value doesn't align with the axis.
This changes when resizing.

Possible positions: 
- above or below the X axis 
- left or right of the Y axis

Add grid line style selector

ChartDataSource control should perform the sampling operation asynchronously in a background thread so that it is not blocking the UI thread.

Users should be able to create custom financial indicators.

Extend ChartSelectionBehavior to support continuous range selection through drag&drop.

Add support for ScatterBar series type i.e. bar series that is plotted against linear / logarithmic axis.

When this mode is on - all of the points for which information in the track ball is shown should be on the left hand side of the mouse.

PlotArea occasionally stops refreshing in live data scenario with asynchronous updates (multithreading).

Numeric axes should be able to specify their PlotMode as categorical axes do (currently numeric axes use hardcoded OnTicks plot mode).