diff --git a/gui/src/Visualization/VisualizationGraphRenderingDelegate.cpp b/gui/src/Visualization/VisualizationGraphRenderingDelegate.cpp
index 3760ec0..b315cd8 100644
--- a/gui/src/Visualization/VisualizationGraphRenderingDelegate.cpp
+++ b/gui/src/Visualization/VisualizationGraphRenderingDelegate.cpp
@@ -3,9 +3,21 @@
 
 namespace {
 
+const auto DATETIME_FORMAT = QStringLiteral("yyyy/MM/dd hh:mm:ss:zzz");
+
+const auto TEXT_TRACER_FORMAT = QStringLiteral("key: %1\nvalue: %2");
+
 /// Timeout after which a tracer is displayed
 const auto TRACER_TIMEOUT = 500;
 
+/// Formats a data value according to the axis on which it is present
+QString formatValue(double value, const QCPAxis &axis)
+{
+    // If the axis is a time axis, formats the value as a date
+    return qSharedPointerDynamicCast<QCPAxisTickerDateTime>(axis.ticker())
+               ? QCPAxisTickerDateTime::keyToDateTime(value).toString(DATETIME_FORMAT)
+               : QString::number(value);
+}
 } // namespace
 
 struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate {
@@ -38,6 +50,24 @@ void VisualizationGraphRenderingDelegate::onMouseMove(QMouseEvent *event) noexce
 
     auto showTracers = [ eventPos = event->pos(), this ]()
     {
+        // Reinits tracers
+        impl->m_PointTracer->setGraph(nullptr);
+        impl->m_PointTracer->setVisible(false);
+        impl->m_TextTracer->setVisible(false);
+        impl->m_Plot.replot();
+
+        // Gets the graph under the mouse position
+        if (auto graph = qobject_cast<QCPGraph *>(impl->m_Plot.plottableAt(eventPos))) {
+            auto mouseKey = graph->keyAxis()->pixelToCoord(eventPos.x());
+            auto graphData = graph->data();
+
+            // Gets the closest data point to the mouse
+            auto graphDataIt = graphData->findBegin(mouseKey);
+            if (graphDataIt != graphData->constEnd()) {
+                auto key = formatValue(graphDataIt->key, *graph->keyAxis());
+                auto value = formatValue(graphDataIt->value, *graph->valueAxis());
+                impl->m_TextTracer->setText(TEXT_TRACER_FORMAT.arg(key, value));
+        }
     };
 
     // Starts the timer to display tracers at timeout