MainWindow.xaml

<Window x:Class="Bitmex.NET.Example.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Bitmex.NET.Example"
        xmlns:componentModel="clr-namespace:System.ComponentModel;assembly=WindowsBase"
        xmlns:models="clr-namespace:Bitmex.NET.Example.Models"
        mc:Ignorable="d"
        Title="Bitmex.NET Example" Height="600" Width="1024">
    <Window.Resources>
        <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"></BooleanToVisibilityConverter>
        <CollectionViewSource x:Key="SortedOrderBookL2Sourse" Source="{Binding OrderBookL2}">
            <CollectionViewSource.SortDescriptions>
                <componentModel:SortDescription PropertyName="Price" Direction="Descending"/>
            </CollectionViewSource.SortDescriptions>
        </CollectionViewSource>

        <Style x:Key="OrderBookItemContainerStyle" TargetType="{x:Type ListViewItem}"  >
            <Style.Triggers>
                <DataTrigger Binding="{Binding Direction}" Value="Buy">
                    <Setter Property="Foreground" Value="Green"></Setter>
                </DataTrigger>
                <DataTrigger Binding="{Binding Direction}" Value="Sell">
                    <Setter Property="Foreground" Value="Red"></Setter>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Window.Resources>
	<Grid>
		<Grid.RowDefinitions>
			<RowDefinition Height="Auto"/>
			<RowDefinition Height="Auto"/>
			<RowDefinition Height="*"/>
		</Grid.RowDefinitions>
        <GroupBox Grid.Row="0" Header="Authorization" Visibility="{Binding IsNotConnected,Converter={StaticResource BooleanToVisibilityConverter}}">
			<Grid>
				<Grid.ColumnDefinitions>
					<ColumnDefinition Width="Auto"/>
					<ColumnDefinition Width="*"/>
				</Grid.ColumnDefinitions>
				<Grid.RowDefinitions>
					<RowDefinition Height="Auto"/>
                    <RowDefinition Height="Auto"/>
				    <RowDefinition Height="Auto"/>
                </Grid.RowDefinitions>
				<Label Grid.Row="0" Grid.Column="0" 
					   Content="Key"></Label>
				<Label Grid.Row="1" Grid.Column="0" Content="Secret"></Label>

				<TextBox Grid.Row="0" Grid.Column="1"  Text="{Binding Key, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Center"></TextBox>
                <TextBox Grid.Row="1" Grid.Column="1"  Text="{Binding Secret, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Center"></TextBox>

			    <StackPanel Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2"  Orientation="Horizontal" HorizontalAlignment="Center" Margin="10">
			        <Button Content="Connect" HorizontalAlignment="Stretch" MinWidth="200" Command="{Binding StartLoadSymbolsCmd}"/>
			    </StackPanel>
            </Grid>
		</GroupBox>
        <GroupBox Header="Trade (buy/sell example)"  Grid.Row="1" Visibility="{Binding IsConnected,Converter={StaticResource BooleanToVisibilityConverter}}">
			<Grid>
				<Grid.ColumnDefinitions>
					<ColumnDefinition Width="Auto"/>
					<ColumnDefinition Width="*"/>
				</Grid.ColumnDefinitions>
				<Grid.RowDefinitions>
					<RowDefinition Height="Auto"/>
					<RowDefinition Height="Auto"/>
				</Grid.RowDefinitions>
				<Label Grid.Row="0" Grid.Column="0" Content="Size"></Label>
				<TextBox Grid.Row="0" Grid.Column="1" Text="{Binding Size}" VerticalAlignment="Center"></TextBox>
				<StackPanel Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" Orientation="Horizontal" HorizontalAlignment="Center" Margin="10">
					<Button Content="Buy" HorizontalAlignment="Stretch" MinWidth="200" Command="{Binding BuyCmd}"/>
					<Button Content="Sell" HorizontalAlignment="Stretch" MinWidth="200" Command="{Binding SellCmd}"/>
				</StackPanel>
			</Grid>
		</GroupBox>
        <GroupBox Header="Instruments (life updates using socket connection example)"  Grid.Row="2" Visibility="{Binding IsConnected,Converter={StaticResource BooleanToVisibilityConverter}}">
			<Grid>
			    <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                <ListView ItemsSource="{Binding Instruments}">
					<ListView.View>
						<GridView>
							<GridViewColumn DisplayMemberBinding="{Binding Symbol}" Header="Symbol"/>
							<GridViewColumn DisplayMemberBinding="{Binding RootSymbol}" Header="RootSymbol"/>
							<GridViewColumn DisplayMemberBinding="{Binding State}" Header="State"/>
							<GridViewColumn DisplayMemberBinding="{Binding Typ}" Header="Typ"/>
							<GridViewColumn DisplayMemberBinding="{Binding LastPrice}" Header="LastPrice"/>
							<GridViewColumn DisplayMemberBinding="{Binding LowPrice}" Header="LowPrice"/>
							<GridViewColumn DisplayMemberBinding="{Binding HighPrice}" Header="HighPrice"/>
							<GridViewColumn DisplayMemberBinding="{Binding LastChangePcnt}" Header="LastChangePcnt"/>
						</GridView>
					</ListView.View>
			    </ListView>
			    <ListView Grid.Row="0" Grid.Column="1" ItemsSource="{Binding OrderUpdates}">
			        <ListView.View>
			            <GridView>
			                <GridViewColumn DisplayMemberBinding="{Binding OrderId}" Header="OrderId"/>
			                <GridViewColumn DisplayMemberBinding="{Binding Account}" Header="Account"/>
			                <GridViewColumn DisplayMemberBinding="{Binding Symbol}" Header="Symbol"/>
			                <GridViewColumn DisplayMemberBinding="{Binding Side}" Header="Side"/>
			                <GridViewColumn DisplayMemberBinding="{Binding SimpleOrderQty}" Header="SimpleOrderQty"/>
			                <GridViewColumn DisplayMemberBinding="{Binding OrderQty}" Header="OrderQty"/>
			                <GridViewColumn DisplayMemberBinding="{Binding Price}" Header="Price"/>
			                <GridViewColumn DisplayMemberBinding="{Binding LeavesQty}" Header="LeavesQty"/>
			            </GridView>
			        </ListView.View>
                </ListView>
                <GroupBox Header="OrderBookL10" Grid.Row="0" Grid.Column="2" >
                    <ListView ItemsSource="{Binding OrderBook10}" ItemContainerStyle="{StaticResource OrderBookItemContainerStyle}">
                        <ListView.View>
                            <GridView>
                                <GridViewColumn DisplayMemberBinding="{Binding Direction}" Header="Direction"/>
                                <GridViewColumn DisplayMemberBinding="{Binding Size}" Header="Size"/>
                                <GridViewColumn DisplayMemberBinding="{Binding Price}" Header="Price"/>
                            </GridView>
                        </ListView.View>
                    </ListView>
                </GroupBox>
			    <GroupBox Header="OrderBookL2" Grid.Row="0" Grid.Column="3" >
                    <ListView ItemsSource="{Binding Source={StaticResource SortedOrderBookL2Sourse}}" ItemContainerStyle="{StaticResource OrderBookItemContainerStyle}">
			            <ListView.View>
			                <GridView>
			                    <GridViewColumn DisplayMemberBinding="{Binding Direction}" Header="Direction"/>
			                    <GridViewColumn DisplayMemberBinding="{Binding Size}" Header="Size"/>
			                    <GridViewColumn DisplayMemberBinding="{Binding Price}" Header="Price"/>
			                </GridView>
			            </ListView.View>
			        </ListView>
			    </GroupBox>
            </Grid>
		</GroupBox>
	</Grid>
</Window>