diff --git a/inc/graph/plugins/plugin.h b/inc/graph/plugins/plugin.h
index d36851f..ea40369 100644
--- a/inc/graph/plugins/plugin.h
+++ b/inc/graph/plugins/plugin.h
@@ -13,7 +13,7 @@ typedef struct {
 
 typedef bool (*start_t)();
 typedef void (*destroy_t)();
-typedef void (*update_callback_t)(unsigned int chartIndex, const char* seriesName, const point_t* points);
+typedef void (*update_callback_t)(unsigned int chartIndex, const char* seriesName, const point_t* points, int count);
 
 typedef struct {
   uint32_t version;
diff --git a/inc/graph/server/gui/chart/chart.h b/inc/graph/server/gui/chart/chart.h
index 1c873ca..cf2daae 100644
--- a/inc/graph/server/gui/chart/chart.h
+++ b/inc/graph/server/gui/chart/chart.h
@@ -16,10 +16,14 @@ class ChartWidget : public QListWidgetItem {
   QChartView* getView() const { return view; }
   QChart* getChart() const { return chart; }
   QList<QAbstractSeries*> getSeries() const { return chart->series(); }
+  QValueAxis* getX() const { return x; }
+  QValueAxis* getY() const { return y; }
+  const chart_spec_t& getSpec() const { return spec; }
 
  private:
   QChartView* view;
   QChart* chart;
   QValueAxis *x, *y;
+  chart_spec_t spec;
 };
 } // namespace Graph::GUI
diff --git a/inc/graph/server/gui/mainwindow.h b/inc/graph/server/gui/mainwindow.h
index 8dae1c3..b85b88c 100644
--- a/inc/graph/server/gui/mainwindow.h
+++ b/inc/graph/server/gui/mainwindow.h
@@ -1,14 +1,12 @@
 #pragma once
 
+#include <graph/server/gui/chart/chart.h>
 #include <graph/server/plugin.h>
-#include <qlineseries.h>
-#include <qlistwidget.h>
 #include <QMainWindow>
 #include <QMenuBar>
 #include <QStatusBar>
 #include <QToolBar>
 #include <vector>
-#include "graph/server/gui/chart/chart.h"
 
 namespace Ui {
 class MainWindow;
@@ -17,10 +15,19 @@ class MainWindow;
 namespace Graph::GUI {
 class MainWindow : public QMainWindow {
   Q_OBJECT
- public:
+ private:
   explicit MainWindow(QWidget* parent = nullptr);
+
+ public:
+  MainWindow(MainWindow& other) = delete;
+  void operator=(const MainWindow&) = delete;
   ~MainWindow();
 
+  static MainWindow* getInstance();
+  static void close();
+
+  void addData(unsigned int chartIndex, const char* seriesName, const point_t* points, int count);
+
  private slots:
   void on_action_Add_triggered();
   void on_action_Load_triggered();
diff --git a/inc/graph/server/plugin.h b/inc/graph/server/plugin.h
index e44e981..4caefef 100644
--- a/inc/graph/server/plugin.h
+++ b/inc/graph/server/plugin.h
@@ -32,6 +32,7 @@ class PluginModel : public QAbstractListModel {
 
   void add(Plugin* plugin);
   void remove(int index);
+  QList<Plugin*>& getPlugins() { return plugins; }
 
  private:
   QList<Plugin*> plugins;
diff --git a/src/graph/plugins/http/http.cpp b/src/graph/plugins/http/http.cpp
index 9d96ab2..9cc92a0 100644
--- a/src/graph/plugins/http/http.cpp
+++ b/src/graph/plugins/http/http.cpp
@@ -14,12 +14,11 @@ bool init() {
   std::cout << "init" << std::endl;
   point_t points[100];
   for (int i = 0; i < 100; i++) {
-    double deg = i*360/100.0;
-    points[i].x = deg;
-    points[i].y = sin(to_rad(deg));
+    points[i].x = i;
+    points[i].y = i;
   }
 
-  plugin.update_callback(0, "1st", points);
+  plugin.update_callback(0, "1st", points, 100);
   return true;
 }
 
diff --git a/src/graph/server/gui/chart/chart.cpp b/src/graph/server/gui/chart/chart.cpp
index 099e3d7..45053a0 100644
--- a/src/graph/server/gui/chart/chart.cpp
+++ b/src/graph/server/gui/chart/chart.cpp
@@ -3,7 +3,7 @@
 #include <iostream>
 
 namespace Graph::GUI {
-ChartWidget::ChartWidget(QWidget* parent, const chart_spec_t& spec) : QListWidgetItem() {
+ChartWidget::ChartWidget(QWidget* parent, const chart_spec_t& spec) : QListWidgetItem(), spec(spec) {
   view = new QChartView(parent);
   chart = new QChart();
 
@@ -30,9 +30,10 @@ ChartWidget::ChartWidget(QWidget* parent, const chart_spec_t& spec) : QListWidge
   chart->addAxis(x, Qt::AlignBottom);
   chart->addAxis(y, Qt::AlignLeft);
 
+  view->setRenderHint(QPainter::Antialiasing);
   view->setChart(chart);
   view->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-  setSizeHint(view->sizeHint()*2);
+  setSizeHint(view->sizeHint() * 4);
 }
 
 ChartWidget::~ChartWidget() {
diff --git a/src/graph/server/gui/mainwindow.cpp b/src/graph/server/gui/mainwindow.cpp
index 4243a72..6d6700f 100644
--- a/src/graph/server/gui/mainwindow.cpp
+++ b/src/graph/server/gui/mainwindow.cpp
@@ -9,7 +9,62 @@
 #include <iostream>
 #include <stdexcept>
 
+#define MIN(a, b) (a < b ? a : b)
+#define MAX(a, b) (a > b ? a : b)
+
 namespace Graph::GUI {
+MainWindow* instance = nullptr;
+
+MainWindow* MainWindow::getInstance() {
+  if (!instance)
+    instance = new MainWindow();
+
+  return instance;
+}
+
+void MainWindow::close() {
+  if (instance)
+    delete instance;
+}
+
+void addData(unsigned int chartIndex, const char* seriesName, const point_t* points, int count) {
+  MainWindow::getInstance()->addData(chartIndex, seriesName, points, count);
+}
+
+void MainWindow::addData(unsigned int chartIndex, const char* seriesName, const point_t* points, int count) {
+  if (chartIndex < 0 || chartIndex >= charts.size())
+    return;
+
+  QString name(seriesName);
+
+  ChartWidget* chart = charts[chartIndex];
+
+  double minX = std::numeric_limits<double>::max(), maxX = std::numeric_limits<double>::min();
+  double minY = std::numeric_limits<double>::max(), maxY = std::numeric_limits<double>::min();
+
+  for (QAbstractSeries* series : chart->getSeries()) {
+    if (series->name() == name) {
+      for (int i = 0; i < count; i++) {
+        *((QLineSeries*)series) << QPointF(points[i].x, points[i].y);
+      }
+    }
+
+    for (QPointF point : ((QLineSeries*)series)->points()) {
+      minX = MIN(minX, point.x());
+      maxX = MAX(maxX, point.x());
+      minY = MIN(minY, point.y());
+      maxY = MAX(maxY, point.y());
+    }
+  }
+
+  if (chart->getSpec().axis.x.auto_limit)
+    chart->getX()->setRange(minX, maxX);
+  if (chart->getSpec().axis.y.auto_limit)
+    chart->getY()->setRange(minY, maxY);
+
+  chart->getView()->update();
+}
+
 MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent), ui(new Ui::MainWindow) {
   ui->setupUi(this);
 
@@ -44,6 +99,8 @@ void MainWindow::on_action_Add_triggered() {
 
   ChartWidget* chart = new ChartWidget(ui->graphsListWidget, dialog.getSpec());
 
+  charts.push_back(chart);
+
   ui->graphsListWidget->addItem(chart);
   ui->graphsListWidget->setItemWidget(chart, chart->getView());
 
@@ -51,8 +108,9 @@ void MainWindow::on_action_Add_triggered() {
     QLineSeries* series = new QLineSeries();
     series->setName(title);
     chart->getChart()->addSeries(series);
-
-    *series << QPointF(0, 1) << QPointF(1, 2) << QPoint(2, 3);
+    for (QAbstractAxis* axis : chart->getChart()->axes()) {
+      series->attachAxis(axis);
+    }
   }
 }
 
@@ -64,7 +122,7 @@ void MainWindow::on_action_Load_triggered() {
 
   try {
     Plugin* plugin = new Plugin(file.toStdString());
-    // plugin->init(update_callback);
+    plugin->init(&Graph::GUI::addData);
     pluginModel->add(plugin);
   } catch (std::runtime_error e) {
     std::cout << e.what() << std::endl;
diff --git a/src/graph/server/main.cpp b/src/graph/server/main.cpp
index 8ed8875..643c368 100644
--- a/src/graph/server/main.cpp
+++ b/src/graph/server/main.cpp
@@ -3,8 +3,8 @@
 
 int main(int argc, char** argv) {
   QApplication app(argc, argv);
-  Graph::GUI::MainWindow window;
-  window.show();
-
-  return app.exec();
+  Graph::GUI::MainWindow::getInstance()->show();
+  int result = app.exec();
+  Graph::GUI::MainWindow::close();
+  return result;
 }
\ No newline at end of file
diff --git a/src/graph/server/plugin.cpp b/src/graph/server/plugin.cpp
index 087d75f..e8f4a01 100644
--- a/src/graph/server/plugin.cpp
+++ b/src/graph/server/plugin.cpp
@@ -17,10 +17,10 @@ Plugin::Plugin(const std::string& path) : path(path) {
 }
 
 Plugin::~Plugin() {
-  if (this->plugin->update_callback)
+  if (this->plugin->destroy_method)
     this->plugin->destroy_method();
 
-  if (this->handle)
+  if (handle)
     dlclose((void*)this->handle);
 }