--- a/src/MainWindow.h	Mon May 16 14:38:12 2022 +0200
+++ b/src/MainWindow.h	Tue May 17 14:37:26 2022 +0200
@@ -54,7 +54,13 @@
 #include <QPrinter>
 #include <QWidget>
 #include <QWebSocket>
+#include <QChart>
+#include <QValueAxis>
+#include <QDateTimeAxis>
+#include <QLineSeries>
+#include <QChartView>
 
+using namespace QtCharts;
 
 typedef struct IniMySQL
 {