<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:chart="http://schemas.telerik.com/2008/xaml/presentation"
    Title="Window1">
    <Grid x:Name="Grid1">
        <Grid.Resources>
            <Style x:Key="CustomPointMarkStyle" TargetType="chart:PointMark">
                <Setter Property="Size" Value="10" />
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="chart:PointMark">
                            <Canvas>
                                <Path x:Name="PART_PointMarkPath"
                                      Canvas.Left="{TemplateBinding PointMarkCanvasLeft}"
                                      Canvas.Top="{TemplateBinding PointMarkCanvasTop}"
							          Style="{TemplateBinding ShapeStyle}" 
							          Width="{TemplateBinding Size}" 
                                      Height="{TemplateBinding Size}"
							          Stretch="Fill"
                                      Data="{Binding DataItem.PointData}">
                                </Path>
                            </Canvas>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </Grid.Resources>

        <chart:RadChart x:Name="RadChart1" />

    </Grid>
</Window>
