diff --git a/History.js b/History.js
index bee26df8e..4e8bbf381 100644
--- a/History.js
+++ b/History.js
@@ -66,6 +66,7 @@
             recalculateScale(callBackFunction);
 
             fileSequence.eventHandler.listenToEvent("Files Updated", onFilesUpdated); // Only the first sequence is supported right now.
+            viewPort.eventHandler.listenToEvent("Offset Changed", onOffsetChanged);
 
             callBackFunction(GLOBAL.DEFAULT_OK_RESPONSE);
 
@@ -139,6 +140,15 @@
         }
     }
 
+    function onOffsetChanged() {
+
+        if (Math.random() * 100 > 95) {
+
+            recalculate()
+        };
+
+    }
+
     function recalculate(callBackFunction) {    
 
         try {