One should be able to add annotations at certain positions within RadChartView.

http://www.telerik.com/help/winforms/chart-features-marked-zones.html

RadChartView - user should be able to enter minimum/maximum width for Bars in BarSeries.

Currently, when you zoom in and out, the position the mouse is initially hovering is not kept, while it should

Add Range series similar to those provided by WPF/SL

http://demos.telerik.com/silverlight/#ChartView/Gallery/Range

Add Scatter area series support for RadChartView.

Axes should allow custom formatting for each individual label. Consider the following scenario - a chart provides information for each hour of the day. Each label should contain only the hours data, however, when the date changes the label should contain the full date information.

Introduce mechanism that will allow the vertical axis to appear at a certain position regardless of the size of its labels. For reference see Stock Series \ Indicators example.

This problem is related to different serie types are added to the chartview

Currently only axes labels can be rotated. There should be a way to rotate series labels as well.

Resolution:

Set the LabelRotationAngle property of the series to preferred angle. 

When one adds data points with negative and positive values, the negative ones should go below the 0, for example, with the following data:

AreaSeries areaSeries = new AreaSeries();
areaSeries.DataPoints.Add(new CategoricalDataPoint(5, "Jan"));
areaSeries.DataPoints.Add(new CategoricalDataPoint(-10, "Apr"));

Resolution: 
To use the functionality one should set the StartPositionAxis and StartPositionValue properties of an axis. The first property is the axis along which the current axis will be aligned. The second is the value where the current axis should be positioned.
Here is a sample code: 
AreaSeries areaSeries = new AreaSeries();
areaSeries.DataPoints.Add(new CategoricalDataPoint(13, "Jan"));
areaSeries.DataPoints.Add(new CategoricalDataPoint(20, "Apr"));
areaSeries.DataPoints.Add(new CategoricalDataPoint(-15, "Jul"));
areaSeries.DataPoints.Add(new CategoricalDataPoint(16, "Oct"));
this.radChartView1.Series.Add(areaSeries);

areaSeries.HorizontalAxis.StartPositionAxis = areaSeries.VerticalAxis;
areaSeries.HorizontalAxis.StartPositionValue = 0; 

Add HLC (high-low-close) Series to RadChartView

We should add a way for users to bind a property in the data source that will be used as a legend title for pie data points.

Resolution: 

Set the LegendTitleMember property to bind legend title of PieSeries. 

Currently, ScatterSeries are able to use NumericAxes only. A good improvement will be to allow using DateTimeContinuousAxes as well.

Add Bubble series support for RadChartView

The lasso controller should zoom vertically as well.

Add vertical cursors for Line series that stay in place unless the user drags them. Each cursor should select the data points that covers. The cursor should allow setting its position programmatically.