Index: sources/gui/qml/components/RangeBar.qml
===================================================================
diff -u -r5dce80bb3079b3f0e6e134110e267be3277c3a8d -r229870eb947f48ebc4fed9390cd426daea5682e9
--- sources/gui/qml/components/RangeBar.qml	(.../RangeBar.qml)	(revision 5dce80bb3079b3f0e6e134110e267be3277c3a8d)
+++ sources/gui/qml/components/RangeBar.qml	(.../RangeBar.qml)	(revision 229870eb947f48ebc4fed9390cd426daea5682e9)
@@ -32,9 +32,18 @@
 
     property alias  rangebar    : _rangeRect
 
+    QtObject { id: _private
+        property int  val           : isOutLower ? min : isOutUpper ? max : value
+        property int  min           : minimum
+        property int  max           : maximum
+        property bool isOutLower    : value < min
+        property bool isOutUpper    : value > max
+        property bool isOutRange    : isOutLower || isOutUpper
+    }
+
     property int    markerHeight: Variables.rangeMarkerHeightMidle
-    property color  markerColor : markerOutRangeNotify ? (value >= lowerBound && value <= upperBound ? Colors.rangeMarker : Colors.red) : Colors.rangeMarker
-    property bool   markerOutRangeNotify: false
+    property color  markerColor : markerOutRangeNotify ? ( _private.isOutRange ? Colors.red : Colors.rangeMarker) : Colors.rangeMarker
+    property bool   markerOutRangeNotify: true
 
     property bool   markerVisible       : true
     property int    markerBoundHeight   : Variables.rangeMarkerHeightShort
@@ -83,7 +92,7 @@
         visible: _root.markerVisible
         decimal: _root.decimal
         value   : parent.value
-        x       : ((parent.width * (parent.value - minimum)) / (maximum - minimum))
+        x       : ((parent.width * (_private.val - _private.min)) / (_private.max - _private.min))
         text.visible: true
         text.font.pixelSize: _root.markerFontSize
         hasHandle   : true