Binding a stackpanel

I would like to bind a stackpanel to an ObservableCollection(Of Grid), but I don't know how :-(

At the moment I use CollectionChanged event and NotifyCollectionChangedAction, in this way I can Add/Remove object, but not move it. I can change index of collection items, but how can I move object in the stackpanel?

This is a piece of my xaml

       <ScrollViewer Name="StickyScroll" Grid.Row="1"  CanContentScroll="True" VerticalScrollBarVisibility="Auto">
            <StackPanel Name="DockSticky" >
                <StackPanel.Background>
                    <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                        <LinearGradientBrush.GradientStops>
                            <GradientStop Color="{Binding Path=DockBackColor}" Offset="0"/>
                            <GradientStop Color="Transparent" Offset="3"/>
                        </LinearGradientBrush.GradientStops>
                    </LinearGradientBrush>
                </StackPanel.Background>
                <StackPanel.ContextMenu>
                    <ContextMenu>
                        <MenuItem Click="newTextITEM" Header="New Textbox" />
                        <MenuItem Click="NewChkITEM" Header="NewCheckBOX" />
                        <Separator />
                        <MenuItem Click="closeSticky" Header="Close Sticky" />
                        <MenuItem Header="Move UP" />
                        <MenuItem Header="Move Down" />
                        <Separator />
                        <MenuItem Click="closeProgram" Header="Exit Program" />
                        <!--<MenuItem Click="Collapse" Header="Collapse" />-->
                    </ContextMenu>
                </StackPanel.ContextMenu>
            </StackPanel>