Null value support for Chart for Xamarin Forms, so that if there is a null value, a line chart should appear "disconnected" at the point where the nulls are. Available in the R3 2018 SP release.
A common scenario for the Chart is to have several Y-Axis, where some could be on the left, others could be on the right side of the Chart.
The data points should allow setting shape and color to each one individually.
Add support for dynamic series through ChartSeriesProvider API
In some cases, a redundant extra tick is drawn when using a DateTimeContinuousAxis.
Currently the only way to apply different colors to the bars is through the ChartPalette. Provide an option to set the color according to the bound data item.
Allow easy exporting of a chart to a Xamarin.Forms image object. This will allow the images to be shared using social media.
Provide ability to chart series to appear with animation
Currently RadChart provides only a ScatterPointSeries which does not support categorical axes and you can only use a numerical one.
The VisibleRange property can hold the actual visible minimum and maximum of the axis while the chart is being zoomed and panned.
Expose API for series items label formatting in the chart.
Add a title for the horizontal and vertical axis.
The Chart should be able to display callout annotations.
When the chart has a lot of data, you may not necessarily want to show it all when the chart initially appears, but you may want to show the chart in a semi-zoomed state. Therefore, there should be properties which govern the ranges by which the chart should appear zoomed initially. So, the end-user should be able to zoom in/out starting from this state and then return to the same state if necessary (avoiding getting the whole data if he zooms out too much).