There are two approaches, which can be used to achieve the desired view.
First you can set the ClipToPlotArea="False" of the LineSeries and ClipToBounds="False" of the RadChart itself as is demonstrated in the attached project.
The second possible approach is, if you know preliminary the ranges (min and max value) of the data that will be plot, you can set explicitly "Minimum" and "Maximum" of your axes if they are (inherit from) NumericalAxis as described here
. Or you can try the different values of the "PlotMode
" property for CategoricalAxis.
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