diff --git a/src/barplot.cpp b/src/barplot.cpp
--- a/src/barplot.cpp
+++ b/src/barplot.cpp
@@ -25,9 +25,12 @@ BarPlot::BarPlot(ChannelManager* channel
     _channelMan = channelMan;
     barChart.attach(this);
 
-    connect(_channelMan, &ChannelManager::dataAdded, [this]()
-            {
-                barChart.resample();
-                replot();
-            });
+    connect(_channelMan, &ChannelManager::dataAdded, this, &BarPlot::update);
+    connect(_channelMan, &ChannelManager::numOfChannelsChanged, this, &BarPlot::update);
 }
+
+void BarPlot::update()
+{
+    barChart.resample();
+    replot();
+}
diff --git a/src/barplot.h b/src/barplot.h
--- a/src/barplot.h
+++ b/src/barplot.h
@@ -37,6 +37,9 @@ private:
     BarChart barChart;
 
     QVector<double> chartData() const;
+
+private slots:
+    void update();
 };
 
 #endif // BARPLOT_H