<Style x:Key="GoogleLineDataPointStyle" TargetType="charting:LineDataPoint" >
	    <Setter Property="Background" Value="#0077CC" />
	    <Setter Property="BorderBrush" Value="White"/>
	    <Setter Property="BorderThickness" Value="2"/>
	    <Setter Property="IsTabStop" Value="False"/>
	    <Setter Property="Template">
	        <Setter.Value>
	            <ControlTemplate TargetType="charting:LineDataPoint">
	                <Grid x:Name="Root" Opacity="1">
	                    <ToolTipService.ToolTip>
	                        <StackPanel Margin="2,2,2,2">
	                            <!--<ContentControl Content="{Binding Converter={cvt:ChartDataValueConverter}" />-->
	                            <ContentControl Content="{TemplateBinding DependentValue}" />
	                        </StackPanel>
	                    </ToolTipService.ToolTip>
	                    <Ellipse StrokeThickness="{TemplateBinding BorderThickness}" 
	                     Stroke="{TemplateBinding BorderBrush}" 
	                     Fill="{TemplateBinding Background}"/>
	                </Grid>
	            </ControlTemplate>
	        </Setter.Value>
	    </Setter>
	</Style>