diff --git a/Graphs/gSummaryChart.cpp b/Graphs/gSummaryChart.cpp
index c6b94e5d..ece75192 100644
--- a/Graphs/gSummaryChart.cpp
+++ b/Graphs/gSummaryChart.cpp
@@ -65,7 +65,7 @@ void SummaryChart::SetDay(Day * nullday)
             for (int i=0;i<d.value().size();i++) {
                 day=d.value()[i];
                 if (day->machine_type()!=m_machinetype) continue;
-                if (type==ST_HOURS || day->channelExists(code) || day->settingExists(code)) { // too many lookups happening here.. stop the crap..
+                if (type==ST_HOURS || type==ST_SESSIONS || day->channelHasData(code) || day->settingExists(code)) { // too many lookups happening here.. stop the crap..
                     m_days[dn]=day;
                     switch(m_type[j]) {
                         case ST_AVG: tmp=day->avg(code); break;
@@ -78,6 +78,7 @@ void SummaryChart::SetDay(Day * nullday)
                         case ST_CPH: tmp=day->cph(code); break;
                         case ST_SPH: tmp=day->sph(code); break;
                         case ST_HOURS: tmp=day->hours(); break;
+                        case ST_SESSIONS: tmp=day->size(); break;
                         case ST_SETMIN: tmp=day->settings_min(code); break;
                         case ST_SETMAX: tmp=day->settings_max(code); break;
                         case ST_SETAVG: tmp=day->settings_avg(code); break;
@@ -352,6 +353,8 @@ void SummaryChart::paint(gGraph & w,int left, int top, int width, int height)
                 case ST_CPH:  a+=""; break;
                 case ST_SPH:  a+="%"; break;
                 case ST_HOURS: a+="Hours"; break;
+                case ST_SESSIONS: a+="Sessions"; break;
+
                 default:
                     break;
         }
@@ -403,6 +406,7 @@ void SummaryChart::paint(gGraph & w,int left, int top, int width, int height)
 
     w.renderText(a,left,top-3);
 }
+
 bool SummaryChart::mouseMoveEvent(QMouseEvent *event)
 {
     int x=event->x()-l_left;
@@ -472,13 +476,19 @@ bool SummaryChart::mouseMoveEvent(QMouseEvent *event)
                             case ST_CPH:  a=""; break;
                             case ST_SPH:  a="%"; break;
                             case ST_HOURS: a="Hours"; break;
+                            case ST_SESSIONS: a="Sessions"; break;
                             default:
                                 break;
                     }
-                    if (day && (day->channelExists(m_codes[i]) || day->settingExists(m_codes[i]))) {
-                        schema::Channel & chan=schema::channel[m_codes[i]];
-                        val=QString::number(d.value()[i+1],'f',2);
-                        z+="\r\n"+chan.label()+" "+a+"="+val;
+                    if (m_type[i]==ST_SESSIONS) {
+                        val=QString::number(d.value()[i+1],'f',0);
+                        z+="\r\n"+a+"="+val;
+                    } else {
+                        if (day && (day->channelExists(m_codes[i]) || day->settingExists(m_codes[i]))) {
+                            schema::Channel & chan=schema::channel[m_codes[i]];
+                            val=QString::number(d.value()[i+1],'f',2);
+                            z+="\r\n"+chan.label()+" "+a+"="+val;
+                        }
                     }
                 }
 
diff --git a/SleepLib/session.cpp b/SleepLib/session.cpp
index 3aa078a0..f2a0b4c3 100644
--- a/SleepLib/session.cpp
+++ b/SleepLib/session.cpp
@@ -549,6 +549,7 @@ bool Session::channelExists(ChannelID id)
         QHash<ChannelID,int>::iterator q=m_cnt.find(id);
         if (q==m_cnt.end())
             return false;
+        if (q.value()==0) return false;
     }
     return true;
 }
diff --git a/SleepLib/session.h b/SleepLib/session.h
index f80d60a6..2492ee9d 100644
--- a/SleepLib/session.h
+++ b/SleepLib/session.h
@@ -19,7 +19,7 @@
 class Machine;
 const quint32 magic=0xC73216AB;
 
-enum SummaryType { ST_CNT, ST_SUM, ST_AVG, ST_WAVG, ST_90P, ST_MIN, ST_MAX, ST_CPH, ST_SPH, ST_FIRST, ST_LAST, ST_HOURS, ST_SETMIN, ST_SETAVG, ST_SETMAX, ST_SETWAVG, ST_SETSUM };
+enum SummaryType { ST_CNT, ST_SUM, ST_AVG, ST_WAVG, ST_90P, ST_MIN, ST_MAX, ST_CPH, ST_SPH, ST_FIRST, ST_LAST, ST_HOURS, ST_SESSIONS, ST_SETMIN, ST_SETAVG, ST_SETMAX, ST_SETWAVG, ST_SETSUM };
 
 class Session
 {
diff --git a/overview.cpp b/overview.cpp
index 68ddc8ca..83e69e2e 100644
--- a/overview.cpp
+++ b/overview.cpp
@@ -54,6 +54,7 @@ Overview::Overview(QWidget *parent,gGraphView * shared) :
     PR=new gGraph(GraphView,"Pressure",default_height,0);
     SET=new gGraph(GraphView,"Settings",default_height,0);
     LK=new gGraph(GraphView,"Leaks",default_height,0);
+    SES=new gGraph(GraphView,"Sessions",default_height,0);
 
     uc=new SummaryChart("Hours",GT_BAR);
     uc->addSlice("",QColor("green"),ST_HOURS);
@@ -64,6 +65,16 @@ Overview::Overview(QWidget *parent,gGraphView * shared) :
     UC->AddLayer(uc);
     UC->AddLayer(new gXGrid());
 
+    ses=new SummaryChart("Sessions",GT_LINE);
+    ses->addSlice("",QColor("blue"),ST_SESSIONS);
+    SES->AddLayer(new gYAxis(),LayerLeft,gYAxis::Margin);
+    gx=new gXAxis();
+    gx->setUtcFix(true);
+    SES->AddLayer(gx,LayerBottom,0,gXAxis::Margin);
+    SES->AddLayer(ses);
+    SES->AddLayer(new gXGrid());
+
+
 
     bc=new SummaryChart("AHI",GT_BAR);
     bc->addSlice(CPAP_Hypopnea,QColor("blue"),ST_CPH);
@@ -260,6 +271,7 @@ QString Overview::GetHTML()
         pr->deselect();
         lk->deselect();
         npb->deselect();
+        ses->deselect();
 
         report->ReloadGraphs();
         QString reportname="overview";
diff --git a/overview.h b/overview.h
index 54e04a1e..5d5a00fc 100644
--- a/overview.h
+++ b/overview.h
@@ -34,8 +34,8 @@ public:
     void RedrawGraphs();
 
 
-    gGraph *AHI,*UC,*PR,*LK,*NPB,*SET;
-    SummaryChart *bc,*uc,*pr,*lk,*npb,*set;
+    gGraph *AHI,*UC,*PR,*LK,*NPB,*SET,*SES;
+    SummaryChart *bc,*uc,*pr,*lk,*npb,*set,*ses;
 public slots:
     void on_printButton_clicked();