diff --git a/gui/NeuroUI/NeuroUI.pro b/gui/NeuroUI/NeuroUI.pro
index 5a88fef..66639e1 100644
--- a/gui/NeuroUI/NeuroUI.pro
+++ b/gui/NeuroUI/NeuroUI.pro
@@ -17,13 +17,15 @@ SOURCES += main.cpp\
     ../../Layer.cpp \
     ../../Net.cpp \
     ../../Neuron.cpp \
-    netlearner.cpp
+    netlearner.cpp \
+    errorplotter.cpp
 
 HEADERS  += neuroui.h \
     ../../Layer.h \
     ../../Net.h \
     ../../Neuron.h \
-    netlearner.h
+    netlearner.h \
+    errorplotter.h
 
 FORMS    += neuroui.ui
 
diff --git a/gui/NeuroUI/errorplotter.cpp b/gui/NeuroUI/errorplotter.cpp
new file mode 100644
index 0000000..4e6f0b3
--- /dev/null
+++ b/gui/NeuroUI/errorplotter.cpp
@@ -0,0 +1,69 @@
+#include "errorplotter.h"
+
+#include <QPainter>
+
+ErrorPlotter::ErrorPlotter(QWidget *parent)
+    : QWidget(parent)
+    , m_maxErrorValue(0.0)
+{
+}
+
+QSize ErrorPlotter::minimumSizeHint() const
+{
+    return QSize(100, 100);
+}
+
+QSize ErrorPlotter::sizeHint() const
+{
+    return QSize(400, 200);
+}
+
+void ErrorPlotter::clear()
+{
+    m_errorValues.clear();
+    m_maxErrorValue = 0.0;
+
+    update();
+}
+
+void ErrorPlotter::addErrorValue(double errorValue)
+{
+    m_errorValues.push_back(errorValue);
+    m_maxErrorValue = std::max<double>(m_maxErrorValue, errorValue);
+
+    update();
+}
+
+void ErrorPlotter::paintEvent(QPaintEvent *)
+{
+    if (m_errorValues.empty() || m_maxErrorValue == 0)
+    {
+        return;
+    }
+
+    QPainter painter(this);
+    painter.setRenderHint(QPainter::Antialiasing, true);
+
+    painter.translate(0.0, height());
+    painter.scale(1.0, -1.0);
+
+    double errorValueScale = height() / m_maxErrorValue;
+
+    auto errorValueIt = m_errorValues.crbegin();
+
+    double prevErrorValue = *errorValueIt;
+    errorValueIt++;
+
+    int xPos = width() - 2;
+    while(errorValueIt != m_errorValues.crend() && xPos >= 0)
+    {
+        double currentErrorValue = *errorValueIt;
+
+        painter.drawLine(xPos + 1, prevErrorValue * errorValueScale,
+                         xPos, currentErrorValue * errorValueScale);
+
+        prevErrorValue = currentErrorValue;
+        errorValueIt++;
+        xPos--;
+    }
+}
diff --git a/gui/NeuroUI/errorplotter.h b/gui/NeuroUI/errorplotter.h
new file mode 100644
index 0000000..47c5093
--- /dev/null
+++ b/gui/NeuroUI/errorplotter.h
@@ -0,0 +1,31 @@
+#ifndef ERRORPLOTTER_H
+#define ERRORPLOTTER_H
+
+#include <QWidget>
+
+class ErrorPlotter : public QWidget
+{
+    Q_OBJECT
+
+private:
+    std::list<double> m_errorValues;
+    double m_maxErrorValue;
+
+public:
+    explicit ErrorPlotter(QWidget *parent = 0);
+
+    QSize minimumSizeHint() const Q_DECL_OVERRIDE;
+    QSize sizeHint() const Q_DECL_OVERRIDE;
+
+    void clear();
+
+protected:
+    void paintEvent(QPaintEvent *) Q_DECL_OVERRIDE;
+
+signals:
+
+public slots:
+    void addErrorValue(double errorValue);
+};
+
+#endif // ERRORPLOTTER_H
diff --git a/gui/NeuroUI/netlearner.cpp b/gui/NeuroUI/netlearner.cpp
index 884f0af..4c68822 100644
--- a/gui/NeuroUI/netlearner.cpp
+++ b/gui/NeuroUI/netlearner.cpp
@@ -12,7 +12,7 @@ void NetLearner::run()
         double batchMaxError = 0.0;
         double batchMeanError = 0.0;
 
-        size_t numIterations = 100000;
+        size_t numIterations = 1000000;
         for (size_t iteration = 0; iteration < numIterations; ++iteration)
         {
             std::vector<double> inputValues =
@@ -47,6 +47,7 @@ void NetLearner::run()
                 logString.append(QString::number(std::abs(batchMeanError / batchSize)));
 
                 emit logMessage(logString);
+                emit currentNetError(batchMaxError);
 
                 batchIndex = 0;
                 batchMaxError = 0.0;
diff --git a/gui/NeuroUI/netlearner.h b/gui/NeuroUI/netlearner.h
index a21f6b1..2c2b6fa 100644
--- a/gui/NeuroUI/netlearner.h
+++ b/gui/NeuroUI/netlearner.h
@@ -13,6 +13,7 @@ private:
 signals:
     void logMessage(const QString &logMessage);
     void progress(double progress);
+    void currentNetError(double error);
 };
 
 #endif // NETLEARNER_H
diff --git a/gui/NeuroUI/neuroui.cpp b/gui/NeuroUI/neuroui.cpp
index 75452b3..b8feeba 100644
--- a/gui/NeuroUI/neuroui.cpp
+++ b/gui/NeuroUI/neuroui.cpp
@@ -18,6 +18,7 @@ NeuroUI::~NeuroUI()
 void NeuroUI::on_runButton_clicked()
 {
     ui->logView->clear();
+    ui->errorPlotter->clear();
 
     if (m_netLearner == nullptr)
     {
@@ -30,6 +31,8 @@ void NeuroUI::on_runButton_clicked()
     connect(m_netLearner.get(), &NetLearner::started, this, &NeuroUI::netLearnerStarted);
     connect(m_netLearner.get(), &NetLearner::finished, this, &NeuroUI::netLearnerFinished);
 
+    connect(m_netLearner.get(), &NetLearner::currentNetError, ui->errorPlotter, &ErrorPlotter::addErrorValue);
+
     m_netLearner->start();
 }
 
diff --git a/gui/NeuroUI/neuroui.ui b/gui/NeuroUI/neuroui.ui
index 1e021f7..b05a61f 100644
--- a/gui/NeuroUI/neuroui.ui
+++ b/gui/NeuroUI/neuroui.ui
@@ -22,6 +22,16 @@
     <item>
      <widget class="QListWidget" name="logView"/>
     </item>
+    <item>
+     <widget class="ErrorPlotter" name="errorPlotter" native="true">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+     </widget>
+    </item>
     <item>
      <layout class="QHBoxLayout" name="horizontalLayout">
       <item>
@@ -50,6 +60,14 @@
   </widget>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
+ <customwidgets>
+  <customwidget>
+   <class>ErrorPlotter</class>
+   <extends>QWidget</extends>
+   <header>errorplotter.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
  <resources>
   <include location="icons.qrc"/>
  </resources>