diff --git a/src/YALV.Core/Domain/LogItem.cs b/src/YALV.Core/Domain/LogItem.cs
index 317580c..6802b76 100644
--- a/src/YALV.Core/Domain/LogItem.cs
+++ b/src/YALV.Core/Domain/LogItem.cs
@@ -54,6 +54,9 @@ private void assignLevelIndex(string level)
             string ul = !String.IsNullOrWhiteSpace(level) ? level.Trim().ToUpper() : string.Empty;
             switch (ul)
             {
+                case "TRACE":
+                    LevelIndex = LevelIndex.TRACE;
+                    break;
                 case "DEBUG":
                     LevelIndex = LevelIndex.DEBUG;
                     break;
@@ -81,10 +84,11 @@ private void assignLevelIndex(string level)
     public enum LevelIndex
     {
         NONE = 0,
-        DEBUG = 1,
-        INFO = 2,
-        WARN = 3,
-        ERROR = 4,
-        FATAL = 5
+        TRACE = 1,
+        DEBUG = 2,
+        INFO = 3,
+        WARN = 4,
+        ERROR = 5,
+        FATAL = 6
     }
 }
diff --git a/src/YALV/Common/Converters/LevelToSolidColorConverter.cs b/src/YALV/Common/Converters/LevelToSolidColorConverter.cs
index 7f505cc..8a7b744 100644
--- a/src/YALV/Common/Converters/LevelToSolidColorConverter.cs
+++ b/src/YALV/Common/Converters/LevelToSolidColorConverter.cs
@@ -5,9 +5,12 @@
 
 namespace YALV.Common.Converters
 {
+    using YALV.Core.Domain;
+
     public class LevelToSolidColorConverter
         : IValueConverter
     {
+        private SolidColorBrush traceColor = Application.Current.FindResource("TraceLevelColor") as SolidColorBrush;
         private SolidColorBrush debugColor = Application.Current.FindResource("DebugLevelColor") as SolidColorBrush;
         private SolidColorBrush infoColor = Application.Current.FindResource("InfoLevelColor") as SolidColorBrush;
         private SolidColorBrush warnColor = Application.Current.FindResource("WarnLevelColor") as SolidColorBrush;
@@ -22,15 +25,17 @@ public object Convert(object value, Type targetType, object parameter, System.Gl
             int levelIndex = (int)value;
             switch (levelIndex)
             {
-                case 1:
+                case (int)LevelIndex.TRACE:
+                    return traceColor ?? Brushes.Transparent;
+                case (int)LevelIndex.DEBUG:
                     return debugColor ?? Brushes.Transparent;
-                case 2:
+                case (int)LevelIndex.INFO:
                     return infoColor ?? Brushes.Transparent;
-                case 3:
+                case (int)LevelIndex.WARN:
                     return warnColor ?? Brushes.Transparent;
-                case 4:
+                case (int)LevelIndex.ERROR:
                     return errorColor ?? Brushes.Transparent;
-                case 5:
+                case (int)LevelIndex.FATAL:
                     return fatalColor ?? Brushes.Transparent;
                 default:
                     return Brushes.Transparent;
diff --git a/src/YALV/MainWindow.xaml b/src/YALV/MainWindow.xaml
index 0650937..c4eb4f2 100644
--- a/src/YALV/MainWindow.xaml
+++ b/src/YALV/MainWindow.xaml
@@ -160,6 +160,28 @@
                                                 </TextBlock.Text>
                                     </TextBlock>
                                 </StackPanel>
+                                <!-- TRACE -->
+                                <StackPanel
+                                    Margin="15,0,0,0"
+                                    Orientation="Vertical">
+                                    <ContentControl
+                                        Content="{StaticResource RadioButtonTrace}"
+                                        HorizontalAlignment="Center" />
+                                    <TextBlock
+                                        Style="{StaticResource tbCountStyle}">
+                                        <TextBlock.Text>
+                                            <MultiBinding
+                                                        StringFormat="{}[ {0} / {1} ]">
+                                                <Binding
+                                                            Mode="OneWay"
+                                                            Path="ItemsTraceFilterCount" />
+                                                <Binding
+                                                            Mode="OneWay"
+                                                            Path="ItemsTraceCount" />
+                                            </MultiBinding>
+                                        </TextBlock.Text>
+                                    </TextBlock>
+                                </StackPanel>
                                 <!-- DEBUG -->
                                 <StackPanel
                                     Margin="15,0,0,0"
@@ -296,6 +318,14 @@
                                     </Style>
                                 </StackPanel.Resources>
 
+                                <Border
+                                    Background="{StaticResource TraceLevelColor}">
+                                    <CheckBox
+                                        IsChecked="{Binding Path=ShowLevelTrace}"
+                                        Name="chkShowTrace"
+                                        ToolTip="TRACE" />
+                                </Border>
+                                
                                 <Border
                                     Background="{StaticResource DebugLevelColor}">
                                     <CheckBox
diff --git a/src/YALV/Resources/GlobalResources.xaml b/src/YALV/Resources/GlobalResources.xaml
index 2c39dda..2bf673f 100644
--- a/src/YALV/Resources/GlobalResources.xaml
+++ b/src/YALV/Resources/GlobalResources.xaml
@@ -63,6 +63,10 @@
         PresentationOptions:Freeze="True" />
 
     <!-- LEVEL COLORS -->
+    <SolidColorBrush
+        x:Key="TraceLevelColor"
+        Color="LightCyan"
+        PresentationOptions:Freeze="True" />
     <SolidColorBrush
         x:Key="DebugLevelColor"
         Color="LightBlue"
@@ -459,10 +463,19 @@
         TargetType="{x:Type DataGridRow}">
         <Style.Triggers>
 
-            <!-- Debug -->
+            <!-- Trace -->
             <DataTrigger
                 Binding="{Binding Path=LevelIndex, Mode=OneWay}"
                 Value="1">
+                <Setter
+                    Property="Background"
+                    Value="{StaticResource TraceLevelColor}" />
+            </DataTrigger>
+
+            <!-- Debug -->
+            <DataTrigger
+                Binding="{Binding Path=LevelIndex, Mode=OneWay}"
+                Value="2">
                 <Setter
                     Property="Background"
                     Value="{StaticResource DebugLevelColor}" />
@@ -471,7 +484,7 @@
             <!-- Info -->
             <DataTrigger
                 Binding="{Binding Path=LevelIndex, Mode=OneWay}"
-                Value="2">
+                Value="3">
                 <Setter
                     Property="Background"
                     Value="{StaticResource InfoLevelColor}" />
@@ -480,7 +493,7 @@
             <!-- Warn -->
             <DataTrigger
                 Binding="{Binding Path=LevelIndex, Mode=OneWay}"
-                Value="3">
+                Value="4">
                 <Setter
                     Property="Background"
                     Value="{StaticResource WarnLevelColor}" />
@@ -489,7 +502,7 @@
             <!-- Error -->
             <DataTrigger
                 Binding="{Binding Path=LevelIndex, Mode=OneWay}"
-                Value="4">
+                Value="5">
                 <Setter
                     Property="Background"
                     Value="{StaticResource ErrorLevelColor}" />
@@ -498,7 +511,7 @@
             <!-- Fatal -->
             <DataTrigger
                 Binding="{Binding Path=LevelIndex, Mode=OneWay}"
-                Value="5">
+                Value="6">
                 <Setter
                     Property="Background"
                     Value="{StaticResource FatalLevelColor}" />
@@ -561,6 +574,25 @@
         </DockPanel>
     </Border>
 
+    <Border
+        Style="{StaticResource borderRbStyle}"
+        x:Key="RadioButtonTrace"
+        Background="{StaticResource TraceLevelColor}">
+        <DockPanel
+            LastChildFill="True">
+            <RadioButton
+                DockPanel.Dock="Left"
+                GroupName="Selection"
+                IsChecked="{Binding Path=SelectTrace}">
+                <TextBlock
+                    VerticalAlignment="Center"
+                    Style="{StaticResource tbRbStyle}"
+                    Text="TRACE" />
+
+            </RadioButton>
+        </DockPanel>
+    </Border>
+
     <Border
         Style="{StaticResource borderRbStyle}"
         x:Key="RadioButtonDebug"
diff --git a/src/YALV/ViewModel/MainWindowVM.cs b/src/YALV/ViewModel/MainWindowVM.cs
index 9a42551..768480b 100644
--- a/src/YALV/ViewModel/MainWindowVM.cs
+++ b/src/YALV/ViewModel/MainWindowVM.cs
@@ -47,8 +47,8 @@ public MainWindowVM(IWinSimple win)
             IsLoading = false;
 
             _selectAll = true;
-            _selectDebug = _selectInfo = _selectWarn = _selectError = _selectFatal = false;
-            _showLevelDebug = _showLevelInfo = _showLevelWarn = _showLevelError = _showLevelFatal = true;
+            _selectTrace = _selectDebug = _selectInfo = _selectWarn = _selectError = _selectFatal = false;
+            _showLevelTrace = _showLevelDebug = _showLevelInfo = _showLevelWarn = _showLevelError = _showLevelFatal = true;
 
             bkLoader = new BackgroundWorker();
             bkLoader.WorkerSupportsCancellation = true;
@@ -684,6 +684,26 @@ public LogItem SelectedLogItem
         private LogItem _selectedLogItem;
         public static string PROP_SelectedLogItem = "SelectedLogItem";
 
+        /// <summary>
+        /// ShowLevelTrace Property
+        /// </summary>
+        public bool ShowLevelTrace
+        {
+            get { return _showLevelTrace; }
+            set
+            {
+                if (value != _showLevelTrace)
+                {
+                    _showLevelTrace = value;
+                    RaisePropertyChanged(PROP_ShowLevelTrace);
+                    resetLevelSelection();
+                    RefreshView();
+                }
+            }
+        }
+        private bool _showLevelTrace;
+        public static string PROP_ShowLevelTrace = "ShowLevelTrace";
+
         /// <summary>
         /// ShowLevelDebug Property
         /// </summary>
@@ -799,7 +819,7 @@ public bool SelectAll
 
                     if (_selectAll)
                     {
-                        _showLevelDebug = _showLevelInfo = _showLevelWarn = _showLevelError = _showLevelFatal = true;
+                        _showLevelTrace = _showLevelDebug = _showLevelInfo = _showLevelWarn = _showLevelError = _showLevelFatal = true;
                         refreshCheckBoxBinding();
                         RefreshView();
                     }
@@ -809,6 +829,32 @@ public bool SelectAll
         private bool _selectAll;
         public static string PROP_SelectAll = "SelectAll";
 
+        /// <summary>
+        /// SelectTrace Property
+        /// </summary>
+        public bool SelectTrace
+        {
+            get { return _selectTrace; }
+            set
+            {
+                if (value != _selectTrace)
+                {
+                    _selectTrace = value;
+                    RaisePropertyChanged(PROP_SelectTrace);
+
+                    if (_selectTrace)
+                    {
+                        _showLevelDebug = _showLevelInfo = _showLevelWarn = _showLevelError = _showLevelFatal = false;
+                        _showLevelTrace = true;
+                        refreshCheckBoxBinding();
+                        RefreshView();
+                    }
+                }
+            }
+        }
+        private bool _selectTrace;
+        public static string PROP_SelectTrace = "SelectTrace";
+
         /// <summary>
         /// SelectDebug Property
         /// </summary>
@@ -824,7 +870,7 @@ public bool SelectDebug
 
                     if (_selectDebug)
                     {
-                        _showLevelInfo = _showLevelWarn = _showLevelError = _showLevelFatal = false;
+                        _showLevelTrace = _showLevelInfo = _showLevelWarn = _showLevelError = _showLevelFatal = false;
                         _showLevelDebug = true;
                         refreshCheckBoxBinding();
                         RefreshView();
@@ -850,7 +896,7 @@ public bool SelectInfo
 
                     if (_selectInfo)
                     {
-                        _showLevelDebug = _showLevelWarn = _showLevelError = _showLevelFatal = false;
+                        _showLevelTrace = _showLevelDebug = _showLevelWarn = _showLevelError = _showLevelFatal = false;
                         _showLevelInfo = true;
                         refreshCheckBoxBinding();
                         RefreshView();
@@ -876,7 +922,7 @@ public bool SelectWarn
 
                     if (_selectWarn)
                     {
-                        _showLevelDebug = _showLevelInfo = _showLevelError = _showLevelFatal = false;
+                        _showLevelTrace = _showLevelDebug = _showLevelInfo = _showLevelError = _showLevelFatal = false;
                         _showLevelWarn = true;
                         refreshCheckBoxBinding();
                         RefreshView();
@@ -902,7 +948,7 @@ public bool SelectError
 
                     if (_selectError)
                     {
-                        _showLevelDebug = _showLevelInfo = _showLevelWarn = _showLevelFatal = false;
+                        _showLevelTrace = _showLevelDebug = _showLevelInfo = _showLevelWarn = _showLevelFatal = false;
                         _showLevelError = true;
                         refreshCheckBoxBinding();
                         RefreshView();
@@ -928,7 +974,7 @@ public bool SelectFatal
 
                     if (_selectFatal)
                     {
-                        _showLevelDebug = _showLevelInfo = _showLevelWarn = _showLevelError = false;
+                        _showLevelTrace = _showLevelDebug = _showLevelInfo = _showLevelWarn = _showLevelError = false;
                         _showLevelFatal = true;
                         refreshCheckBoxBinding();
                         RefreshView();
@@ -1045,6 +1091,7 @@ public void LoadFileList(string[] pathList, bool add = false)
 
         private void refreshCheckBoxBinding()
         {
+            RaisePropertyChanged(PROP_ShowLevelTrace);
             RaisePropertyChanged(PROP_ShowLevelDebug);
             RaisePropertyChanged(PROP_ShowLevelInfo);
             RaisePropertyChanged(PROP_ShowLevelWarn);
@@ -1055,6 +1102,7 @@ private void refreshCheckBoxBinding()
         private void resetLevelSelection()
         {
             SelectAll = false;
+            SelectTrace = false;
             SelectDebug = false;
             SelectInfo = false;
             SelectWarn = false;
@@ -1389,6 +1437,8 @@ private bool levelCheckFilter(object item)
             {
                 switch (logItem.LevelIndex)
                 {
+                    case LevelIndex.TRACE:
+                        return ShowLevelTrace;
                     case LevelIndex.DEBUG:
                         return ShowLevelDebug;
                     case LevelIndex.INFO:
@@ -1408,6 +1458,21 @@ private bool levelCheckFilter(object item)
 
         #region Counters
 
+        /// <summary>
+        /// ItemsTraceCount Property
+        /// </summary>
+        public int ItemsTraceCount
+        {
+            get { return _itemsTraceCount; }
+            set
+            {
+                _itemsTraceCount = value;
+                RaisePropertyChanged(PROP_ItemsTraceCount);
+            }
+        }
+        private int _itemsTraceCount;
+        public static string PROP_ItemsTraceCount = "ItemsTraceCount";
+
         /// <summary>
         /// ItemsDebugCount Property
         /// </summary>
@@ -1483,6 +1548,21 @@ public int ItemsFatalCount
         private int _itemsFatalCount;
         public static string PROP_ItemsFatalCount = "ItemsFatalCount";
 
+        /// <summary>
+        /// ItemsTraceFilterCount Property
+        /// </summary>
+        public int ItemsTraceFilterCount
+        {
+            get { return _itemsTraceFilterCount; }
+            set
+            {
+                _itemsTraceFilterCount = value;
+                RaisePropertyChanged(PROP_ItemsTraceFilterCount);
+            }
+        }
+        private int _itemsTraceFilterCount;
+        public static string PROP_ItemsTraceFilterCount = "ItemsTraceFilterCount";
+
         /// <summary>
         /// ItemsDebugFilterCount Property
         /// </summary>
@@ -1579,6 +1659,10 @@ private void updateCounters()
                                where it.Level.Equals("DEBUG", StringComparison.OrdinalIgnoreCase)
                                select it).Count();
 
+            ItemsTraceCount = (from it in Items
+                               where it.Level.Equals("TRACE", StringComparison.OrdinalIgnoreCase)
+                               select it).Count();
+
             ItemsInfoCount = (from it in Items
                               where it.Level.Equals("INFO", StringComparison.OrdinalIgnoreCase)
                               select it).Count();
@@ -1607,6 +1691,10 @@ private void updateFilteredCounters(ICollectionView filteredList)
                 {
                     ItemsFilterCount = fltList.Count();
 
+                    ItemsTraceFilterCount = (from it in fltList
+                                             where it.Level.Equals("TRACE", StringComparison.OrdinalIgnoreCase)
+                                             select it).Count();
+
                     ItemsDebugFilterCount = (from it in fltList
                                              where it.Level.Equals("DEBUG", StringComparison.OrdinalIgnoreCase)
                                              select it).Count();
@@ -1631,6 +1719,7 @@ where it.Level.Equals("FATAL", StringComparison.OrdinalIgnoreCase)
             else
             {
                 ItemsFilterCount = 0;
+                ItemsTraceFilterCount = 0;
                 ItemsDebugFilterCount = 0;
                 ItemsInfoFilterCount = 0;
                 ItemsWarnFilterCount = 0;