DataTrigger Works Very slow in WPF

Question

Hi All,
I am Trying to change Datagrid cell background color at runtime by using datatrigger, datatrigger works fine but that is very slow. 

Code:

<DataGridTextColumn.CellStyle>
                        <Style TargetType="{x:Type DataGridCell}">
                            <Style.Triggers>
                                <Trigger Property="IsSelected" Value="True">
                            <Setter Property="Foreground" Value="{Binding Background, ElementName=txtFont, UpdateSourceTrigger=PropertyChanged}"/>
                            <Setter Property="Background" Value="{Binding Background, ElementName=txtBackground, UpdateSourceTrigger=PropertyChanged}" />
                        </Trigger>




                                <DataTrigger Binding="{Binding ColorBIDQty, UpdateSourceTrigger=PropertyChanged}" Value="1">
                                    <Setter Property="Background" Value="{Binding Background, ElementName=txtDownTick, UpdateSourceTrigger=PropertyChanged}" />
                                </DataTrigger>
                                <DataTrigger Binding="{Binding ColorBIDQty, UpdateSourceTrigger=PropertyChanged}" Value="2">
                                    <Setter Property="Background" Value="{Binding Background, ElementName=txtBackground, UpdateSourceTrigger=PropertyChanged}" />
                                </DataTrigger>
                                <DataTrigger Binding="{Binding ColorBIDQty, UpdateSourceTrigger=PropertyChanged}" Value="3">
                                    <Setter Property="Background" Value="{Binding Background, ElementName=txtUpTick, UpdateSourceTrigger=PropertyChanged}" />
                                </DataTrigger>
                            </Style.Triggers>


                        </Style>
                    </DataGridTextColumn.CellStyle>

In the above code i am trying to change the cell background color on the basis of ColorBidQty. The color is not changing in the speed as i expect.



I have erased some text from image because of confidential matter.
Please try to help me
Thanks,
Kailash