Manhattan Bar 3D Series Type (with support for real Z axis)

Decline reason: You can use the new RadChartView3D BarSeries3D.
http://docs.telerik.com/devtools/wpf/controls/radchartview3d/series/barseries3d

Implement two-dimensional Funnel series type for WPF / Silverlight.

Available in R3 2017 Official Release Version.

RadChart should support 3D Surface Series Type.

This feature is now available as part of the ChartView control since R3 2016 Official release. Refer to the link below for more information.
http://docs.telerik.com/devtools/wpf/controls/radchartview3d/series/surfaceseries3d.html

In live data scenario when new items are added old items are scrolled smoothly to the left/right and only the portion of the line on the newly added item in the collection is updated.

Upgrade the visual appearance of our selection and hover interactivity to make them more visible.

Add the ability to select multiple series items through UI drag selection.

Provide access to RadChart in ItemTooltipOpening/Closing event.

A horizontal line from the last data point to the end need to be added.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

Case: Live data scenario in which data comes from the left with step 0.2. The labels should be with step 10 and show only integer labels like this: 0, 10, 20, 30, 40, etc. If the min data at the beginning of the chartarea is 0.6 for example the first label

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView (use the TickOrigin property of the axis).

The options how RadChart draws the pie/doughnut slices need to be extended - there should be a clockwise and anticlockwise direction.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

In Charts with many Y-Axis, it would of great help to link the interaction features of the series with the Y-Axis it is mapped against, basically dimming/hiding the other Y-Axis. It would make it easier for users to find the Axis the series belongs to.

ShowPointMarks property in RangeSeriesDefinition does not work.

Allow the chart to be put in a "series/item hovered" state by API.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

Implement option for automatic layout for axis item labels as the current mechanisms that solve the label overlapping issues with many data points have their limitations:

LabelRotationAngle - The desired rotation angle changes based on how many data point

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView (axes have a LabelFitMode and a SmartLabelsMode property).

Add click event for axis items.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView (axes have a LabelTemplate property, use it to customize appearance and handle click).

The chart area is virtually split into a Grid of n rows an m columns. For each cell you can specify a color.

REASON FOR DECLINATION
This is supported out-of-the-box by RadHeatMap.

The control should be able to automatically distribute the axis item labels on different step levels in order to improve the text visibility of very long axis item labels. Currently this functionality is supported only manually through the AxisX.StepLabelL

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

Add multi-touch support for zoom/scroll, double tap, etc.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

Stick / CandleStick series types should support item labels for Low, High, etc.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView (use the LabelDefinitions property of the series).

Allow for smooth real time chart panning/scrolling.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.