gistfile1.txt

<UserControl xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core" 
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm"
             xmlns:ViewModels="clr-namespace:LogicielClient.UI.ViewModels"
             xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors" 
             xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
             xmlns:dxgt="http://schemas.devexpress.com/winfx/2008/xaml/grid/themekeys"
             mc:Ignorable="d"
             xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/core"
             DataContext="{dxmvvm:ViewModelSource Type= ViewModels:LevelIIViewModel}"
             d:DesignHeight="600" d:DesignWidth="490">
<Grid>
<dxg:GridControl  Grid.Column="0" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" ItemsSource="{Binding L2BidData}" ShowLoadingPanel="False" ShowBorder="False" SelectionMode="Row">
       <dxg:GridControl.View>
             <dxg:TableView  NavigationStyle="Row" ShowGroupPanel="False" FontSize="11" FontFamily="Arial" ShowHorizontalLines="True"  ShowVerticalLines="True" ShowIndicator="False" HeaderPanelMinHeight="25" ImmediateUpdateRowPosition="False" IsSynchronizedWithCurrentItem="False" RowMinHeight="20" HeaderHorizontalAlignment="Center" UseEvenRowBackground="True" AllowConditionalFormattingMenu="True" AllowEditing="False">
                  <dxg:TableView.PredefinedFormats>
                       <dx:FormatInfoCollection>
                           <dx:FormatInfo FormatName="Tier1" DisplayName="Tier1">
                               <dx:FormatInfo.Format>
                                    <dxg:Format  Background="{Binding BackgdColor}" TextBlock.TextAlignment="Left"/>
                               </dx:FormatInfo.Format>
                            </dx:FormatInfo>
                        </dx:FormatInfoCollection>
                    </dxg:TableView.PredefinedFormats>
                <dxg:TableView.FormatConditions>
            <dxg:FormatCondition FieldName="Rank"  ValueRule="Equal" Value1="1" PredefinedFormatName="Tier1" ApplyToRow="True"/>
         </dxg:TableView.FormatConditions>
      </dxg:TableView>
   </dxg:GridControl.View>
   <dxg:GridControl.Columns>
        <dxg:GridColumn Header="Maker" FieldName="Maker" VisibleIndex="1" Width="50" ReadOnly="True"  Binding="{Binding Path=Maker, Mode=TwoWay}" AllowSorting="False"/>
        <dxg:GridColumn Header="Price" FieldName="Price" VisibleIndex="2" Width="65" ReadOnly="True" Binding="{Binding Path=Bid , Mode=TwoWay}"  AllowSorting="False"/>
        <dxg:GridColumn Header="Size" FieldName="Size" VisibleIndex="3" Width="60" ReadOnly="True"   Binding="{Binding Path=Size, Mode=TwoWay}" AllowSorting="False"/>
        <dxg:GridColumn Header="Time" FieldName="Time" VisibleIndex="4" Width="*" ReadOnly="True" Binding="{Binding Path=Time, Mode=TwoWay}" AllowSorting="False"/>
        <dxg:GridColumn Header="Rank" FieldName="Rank" VisibleIndex="5" Width="50" ReadOnly="True"   Binding="{Binding Path=Rank, Mode=TwoWay}" AllowSorting="False" Visible="False"/>
    </dxg:GridControl.Columns>
</dxg:GridControl>
</Grid>
</UserControl>

See my changes here: https://gist.github.com/thomaslevesque/80f9b83223f8f23490972d2eab1bf073/revisions