diff --git a/modules/monitoring/application/controllers/TimelineController.php b/modules/monitoring/application/controllers/TimelineController.php
index c178fb6d2..99a56cbec 100644
--- a/modules/monitoring/application/controllers/TimelineController.php
+++ b/modules/monitoring/application/controllers/TimelineController.php
@@ -46,10 +46,47 @@ class TimelineController extends Controller
                 )
             ),
             array(
-                'notify'        => array(
-                    'class'     => 'timeline-notification',
-                    'detailUrl' => $detailUrl,
-                    'label'     => mt('monitoring', 'Notifications')
+                'notification_ack'  => array(
+                    'class'         => 'timeline-notification',
+                    'detailUrl'     => $detailUrl,
+                    'label'         => mt('monitoring', 'Notifications'),
+                    'groupBy'       => 'notification_*'
+                ),
+                'notification_flapping'  => array(
+                    'class'         => 'timeline-notification',
+                    'detailUrl'     => $detailUrl,
+                    'label'         => mt('monitoring', 'Notifications'),
+                    'groupBy'       => 'notification_*'
+                ),
+                'notification_flapping_end'  => array(
+                    'class'         => 'timeline-notification',
+                    'detailUrl'     => $detailUrl,
+                    'label'         => mt('monitoring', 'Notifications'),
+                    'groupBy'       => 'notification_*'
+                ),
+                'notification_dt_start'  => array(
+                    'class'         => 'timeline-notification',
+                    'detailUrl'     => $detailUrl,
+                    'label'         => mt('monitoring', 'Notifications'),
+                    'groupBy'       => 'notification_*'
+                ),
+                'notification_dt_end'  => array(
+                    'class'         => 'timeline-notification',
+                    'detailUrl'     => $detailUrl,
+                    'label'         => mt('monitoring', 'Notifications'),
+                    'groupBy'       => 'notification_*'
+                ),
+                'notification_custom'  => array(
+                    'class'         => 'timeline-notification',
+                    'detailUrl'     => $detailUrl,
+                    'label'         => mt('monitoring', 'Notifications'),
+                    'groupBy'       => 'notification_*'
+                ),
+                'notification_state'  => array(
+                    'class'         => 'timeline-notification',
+                    'detailUrl'     => $detailUrl,
+                    'label'         => mt('monitoring', 'Notifications'),
+                    'groupBy'       => 'notification_*'
                 ),
                 'hard_state'    => array(
                     'class'     => 'timeline-hard-state',
diff --git a/modules/monitoring/library/Monitoring/Timeline/TimeLine.php b/modules/monitoring/library/Monitoring/Timeline/TimeLine.php
index bfec989bd..d1a98fc40 100644
--- a/modules/monitoring/library/Monitoring/Timeline/TimeLine.php
+++ b/modules/monitoring/library/Monitoring/Timeline/TimeLine.php
@@ -208,6 +208,10 @@ class TimeLine implements IteratorAggregate
     {
         $groupInfo = array();
         foreach ($this->identifiers as $name => $attributes) {
+            if (isset($attributes['groupBy'])) {
+                $name = $attributes['groupBy'];
+            }
+
             $groupInfo[$name]['class'] = $attributes['class'];
             $groupInfo[$name]['label'] = $attributes['label'];
         }
@@ -436,16 +440,28 @@ class TimeLine implements IteratorAggregate
             foreach ($data as $timestamp => $count) {
                 $dateTime = new DateTime();
                 $dateTime->setTimestamp($timestamp);
-                $groups[$timestamp][$name] = TimeEntry::fromArray(
-                    array_merge(
-                        $this->identifiers[$name],
+
+                $groupName = $name;
+                if (isset($this->identifiers[$name]['groupBy'])) {
+                    $groupName = $this->identifiers[$name]['groupBy'];
+                }
+
+                if (isset($groups[$timestamp][$groupName])) {
+                    $groups[$timestamp][$groupName]->setValue(
+                        $groups[$timestamp][$groupName]->getValue() + $count
+                    );
+                } else {
+                    $groups[$timestamp][$groupName] = TimeEntry::fromArray(
                         array(
-                            'name'      => $name,
+                            'name'      => $groupName,
                             'value'     => $count,
-                            'dateTime'  => $dateTime
+                            'dateTime'  => $dateTime,
+                            'class'     => $this->identifiers[$name]['class'],
+                            'detailUrl' => $this->identifiers[$name]['detailUrl'],
+                            'label'     => $this->identifiers[$name]['label']
                         )
-                    )
-                );
+                    );
+                }
             }
         }
 
diff --git a/modules/monitoring/public/css/module.less b/modules/monitoring/public/css/module.less
index 57b80ebfe..7e079adc1 100644
--- a/modules/monitoring/public/css/module.less
+++ b/modules/monitoring/public/css/module.less
@@ -503,21 +503,38 @@ div.timeline {
     }
 
     div.circle-box {
+      // width: inline-style;
       height: 100%;
       margin-right: 0.5em;
       position: relative;
       float: left;
 
       div.outer-circle {
+        // width: inline-style;
+        // height: inline-style;
         position: absolute;
         top: 50%;
+        // margin-top: inline-style;
+
+        &.extrapolated {
+          border-width: 2px;
+          border-style: dotted;
+          //border-color: inline-style;
+          border-radius: 100%;
+          // background-color: inline-style;
+        }
 
         a.inner-circle {
+          // width: inline-style;
+          // height: inline-style;
           display: block;
           position: absolute;
           top: 50%;
           left: 50%;
+          // margin-top: inline-style;
+          // margin-left: inline-style;
           border-radius: 100%;
+          // background-color: inline-style;
         }
       }
     }