How to Create Multi-Series Chart

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• AlphaBeta Pruning TicTacToe is not blocking, is it eval problem?

  I'm debuging this for days and i don't know what I made wrong in this piece of code for Tic-Tac-Toe game and AI (well I know its not real AI but...) I have choosen for this was Alpha-Beta pruning. Its 7x7 board so it would be too heavy for pure minimax implementation.

  Problem I have is that i can't figure out why Alpha-Beta is not blocking player to stall the game and wait for player move and use proper move in his favour, or just simply tie the game.

  I've decided that center of board will have more points(for end score) than the one at the edges of the board. I belive that moves more to the center will have more chance to success than the ones in the edges, thats why i made AddScoreToMove function that evaluates that move. To Ensure that eval function will check EVERY possible moves at board I didn't made that function to work as find first xxx (for example at row0 and col0,col1,col2) and return (cause maybe there is 4X's or 4O's). Also 4X or 4O gives substantially more score than other ones and should be considered as win.
  At this moment my PCplayer( O's) play like this

  Can anyone tell me what i made wrong? It's my second program with AI, and first was with minimax on 3x3 board whitch worked fine.

  C# code is below

  VB.NET CODE:

  Public Class Form1
      Dim board As Char(,) = {
              {" ", " ", " ", " ", " ", " ", " "},
              {" ", " ", " ", " ", " ", " ", " "},
              {" ", " ", " ", " ", " ", " ", " "},
              {" ", " ", " ", " ", " ", " ", " "},
              {" ", " ", " ", " ", " ", " ", " "},
              {" ", " ", " ", " ", " ", " ", " "},
              {" ", " ", " ", " ", " ", " ", " "}}
      Class Move
          Public row, col As Integer
      End Class
      
      Dim BestMoveRow As Integer = 0
      Dim BestMoveCol As Integer = 0
      Dim BestMoveScore As Integer = 0
  
      Shared player As Char = "X", opponent As Char = "O"
  
      Shared Function AddScoreToMove(thatMove As Move) As Integer
          Dim row As Integer = thatMove.row
          Dim col As Integer = thatMove.col
          '0 score, move is at border 
          If ((row >= 1 And row <= 5) And col = 0) Then
              Return 0
          ElseIf ((row >= 1 And row <= 5) And col = 6) Then
              Return 0
          ElseIf (row = 0 And (col >= 0 And col <= 6)) Then
              Return 0
          ElseIf (row = 6 And (col >= 0 And col <= 6)) Then
              Return 0
          End If
  
          '1 score, thatMove is at border +1
          If ((row >= 2 And row <= 4) And col = 1) Then
              Return 1
          ElseIf ((row >= 2 And row <= 4) And col = 5) Then
              Return 1
          ElseIf (row = 1 And (col >= 1 And col <= 5)) Then
              Return 1
          ElseIf (row = 5 And (col >= 1 And col <= 5)) Then
              Return 1
          End If
  
          '2 score, thatMove is at border +2
          If (row = 2 And col = 2) Then
              Return 2
          ElseIf (row = 2 And col = 4) Then
              Return 2
          ElseIf (row = 2 And (col >= 2 And col <= 4)) Then
              Return 2
          ElseIf (row = 4 And (col >= 2 And col <= 4)) Then
              Return 2
          End If
  
          '3 Center thatMove 
          If (row = 3 And col <= 3) Then
              Return 3
          End If
  
          Return 0 'error not added lane
  
      End Function
  
      Private Shared Function eval(ByVal b As Char(,)) As Integer
  
  
  
          Dim playerScorerow As Integer = 0
          Dim playerScorecol As Integer = 0
          Dim playerScorecross As Integer = 0
          Dim pcScorerow As Integer = 0
          Dim pcScorecol As Integer = 0
          Dim pcScorecross As Integer = 0
          
          ''EVALUATE rows 
          For row As Integer = 0 To 3
              For col As Integer = 0 To 6
              'initialize moves to evaluate
                  Dim move3 As New Move With {
                                          .row = row + 3,
                                          .col = col
                                      }
                  Dim move2 As New Move With {
                                          .row = row + 2,
                                          .col = col
                                      }
                  Dim move1 As New Move With {
                                          .row = row + 1,
                                          .col = col
                                      }
                  Dim move0 As New Move With {
                                          .row = row,
                                          .col = col
                                      }
                                      
                  If Not b(row, col) = " " Then 'ITS NOT EMPTY - PLAYER OR PC MOVED HERE
                      Dim moveScore As Integer = AddScoreToMove(move0) 'EVALUATE THAT MOVE 
                      If b(row, col) = b(row + 1, col) Then 'THERE IS 2 X or 2 O
                          Dim move1Score As Integer = AddScoreToMove(move1)
                          If b(row + 1, col) = b(row + 2, col) Then 'THERE IS 3x or 3O
                              Dim move2Score As Integer = AddScoreToMove(move2)
                              If b(row + 2, col) = b(row + 3, col) Then 'THERE IS 4X or 4O
                                  Dim move3Score As Integer = AddScoreToMove(move3)
                                  If b(row, col) = player Then 'PLAYER HAVE 4X HERE
                                      playerScorerow = Math.Max(playerScorerow, 100 + move3Score + move2Score + move1Score + moveScore) 'GET HIGHEST OF ALL EVALUATIONS OF THAT FOR LOOPS
                                  ElseIf b(row, col) = opponent Then 'PC HAVE 4O HERE
                                      pcScorerow = Math.Min(pcScorerow, -100 - move3Score - move2Score - move1Score - moveScore)
                                  End If
                              End If
                              If b(row, col) = player Then
                                  playerScorerow = Math.Max(playerScorerow, 5 + move2Score + move1Score + moveScore)
                              ElseIf b(row, col) = opponent Then
                                  pcScorerow = Math.Min(pcScorerow, -5 - move2Score - move1Score - moveScore)
                              End If
                          End If
                          If b(row, col) = player Then
                              playerScorerow = Math.Max(playerScorerow, 2 + move1Score + moveScore)
                          ElseIf b(row, col) = opponent Then
                              pcScorerow = Math.Min(pcScorerow, -2 - move1Score - moveScore)
                          End If
                      End If
                      If b(row, col) = player Then
                          playerScorerow = Math.Max(playerScorerow, moveScore)
                      ElseIf b(row, col) = opponent Then
                          pcScorerow = Math.Min(pcScorerow, -moveScore)
                      End If
                  End If
              Next
          Next
  
          ''col win
          For row As Integer = 0 To 6
              For col As Integer = 0 To 3
                  Dim move3 As New Move With {
                                          .row = row + 3,
                                          .col = col
                                      }
                  Dim move2 As New Move With {
                                          .row = row + 2,
                                          .col = col
                                      }
                  Dim move1 As New Move With {
                                          .row = row + 1,
                                          .col = col
                                      }
                  Dim move0 As New Move With {
                                          .row = row,
                                          .col = col
                                      }
                  If Not b(row, col) = " " Then
                      Dim moveScore As Integer = AddScoreToMove(move0)
                      If b(row, col) = b(row, col + 1) Then
                          Dim moveScore1 As Integer = AddScoreToMove(move1)
                          If b(row, col + 1) = b(row, col + 2) Then
                              Dim moveScore2 As Integer = AddScoreToMove(move2)
                              If b(row, col + 2) = b(row, col + 3) Then
                                  Dim moveScore3 As Integer = AddScoreToMove(move3)
                                  If b(row, col) = player Then
                                      playerScorerow = Math.Max(playerScorerow, 100 + moveScore3 + moveScore2 + moveScore1 + moveScore)
                                  ElseIf b(row, col) = opponent Then
                                      pcScorerow = Math.Min(pcScorerow, -100 - moveScore3 - moveScore2 - moveScore1 - moveScore)
                                  End If
                              End If
                              If b(row, col) = player Then
                                  playerScorerow = Math.Max(playerScorerow, 5 + moveScore2 + moveScore1 + moveScore)
                              ElseIf b(row, col) = opponent Then
                                  pcScorerow = Math.Min(pcScorerow, -5 - moveScore2 - moveScore1 - moveScore)
                              End If
                          End If
                          If b(row, col) = player Then
                              playerScorerow = Math.Max(playerScorerow, 2 + moveScore1 + moveScore)
                          ElseIf b(row, col) = opponent Then
                              pcScorerow = Math.Min(pcScorerow, -2 - moveScore1 - moveScore)
                          End If
                      End If
                      If b(row, col) = player Then
                          playerScorerow = Math.Max(playerScorerow, moveScore)
                      ElseIf b(row, col) = opponent Then
                          pcScorerow = Math.Min(pcScorerow, -moveScore)
                      End If
                  End If
              Next
          Next
  
          'NOT FULLY IMPLEMENTED
          'cross win
          For row As Integer = 0 To 3
              For col As Integer = 0 To 3
                  If Not b(row, col) = " " Then
                      If (b(row, col) = b(row + 1, col + 1) AndAlso b(row + 1, col + 1) = b(row + 2, col + 2) AndAlso b(row + 2, col + 2) = b(row + 3, col + 3)) Then
                          If b(row, col) = player Then
                              Return +10
                          ElseIf b(row, col) = opponent Then
                              Return -10
                          End If
                      End If
                  End If
              Next
          Next
  
          'NOT FULLY IMPLEMENTED
          'cross win
          For row As Integer = 0 To 3
              For col As Integer = 3 To 6
                  If Not b(row, col) = " " Then
                      If (b(row, col) = b(row + 1, col - 1) AndAlso b(row + 1, col - 1) = b(row + 2, col - 2) AndAlso b(row + 2, col - 2) = b(row + 3, col - 3)) Then
                          If b(row, col) = player Then
                              Return +10
                          ElseIf b(row, col) = opponent Then
                              Return -10
                          End If
                      End If
                  End If
              Next
          Next
  
  
          Dim scoreValues() As Integer = {playerScorerow, playerScorecol, playerScorecross, pcScorerow, pcScorecol, pcScorecross}
          Dim max = scoreValues.OrderByDescending(Function(z) Math.Abs(z)).FirstOrDefault()
          
          Return max
          
      End Function
  
      Private Shared Function MiniMax(ByVal board As Char(,), ByVal machineMove As Boolean, ByVal depth As Integer) As Integer
          Const alpha As Integer = -10_000
          Const beta As Integer = 10_000
          Return AlphaBetaPruning(board, machineMove, depth, beta, alpha)
  
      End Function
  
      Private Shared Function AlphaBetaPruning(ByVal board As Char(,), ByVal machineMove As Boolean, ByVal depth As Integer, ByVal beta As Integer, ByVal alpha As Integer) As Integer
      
          If depth = 0 Then Return eval(board)
          If machineMove Then 'min PC MOVE
              For i As Integer = 0 To 6
                  For j As Integer = 0 To 6
                      If board(i, j) = " " Then
                          board(i, j) = opponent
                          Dim score As Integer = Math.Min(AlphaBetaPruning(board, Not machineMove, depth - 1, beta, alpha), eval(board))
                          board(i, j) = " "
                          If score < beta Then
                              Form1.BestMoveRow = i
                              Form1.BestMoveCol = j
                              Form1.BestMoveScore = score
                              beta = score
                          End If
                          If alpha >= beta Then Exit For 'cutoff
                      End If
                  Next
              Next
              Return beta
          Else 'max PLAYER MOVE
              For i As Integer = 0 To 6
                  For j As Integer = 0 To 6
                      If board(i, j) = " " Then
                          board(i, j) = player
                          Dim score As Integer = Math.Max(AlphaBetaPruning(board, Not machineMove, depth - 1, beta, alpha), eval(board))
                          board(i, j) = " "
                          If score > alpha Then
                              alpha = score
                          End If
                          If alpha >= beta Then Exit For
                      End If
                  Next
              Next
              Return alpha
          End If
      End Function
  End Class
  

  C# CODE

  public class Form1
  {
      private char[,] board = new[] { { " ", " ", " ", " ", " ", " ", " " }, { " ", " ", " ", " ", " ", " ", " " }, { " ", " ", " ", " ", " ", " ", " " }, { " ", " ", " ", " ", " ", " ", " " }, { " ", " ", " ", " ", " ", " ", " " }, { " ", " ", " ", " ", " ", " ", " " }, { " ", " ", " ", " ", " ", " ", " " } };
      class Move
      {
          public int row, col;
      }
  
      private int BestMoveRow = 0;
      private int BestMoveCol = 0;
      private int BestMoveScore = 0;
  
      private static char player = "X";
      private static char opponent = "O";
  
      public static int AddScoreToMove(Move thatMove)
      {
          int row = thatMove.row;
          int col = thatMove.col;
          // 0 score, move is at border 
          if (((row >= 1 & row <= 5) & col == 0))
              return 0;
          else if (((row >= 1 & row <= 5) & col == 6))
              return 0;
          else if ((row == 0 & (col >= 0 & col <= 6)))
              return 0;
          else if ((row == 6 & (col >= 0 & col <= 6)))
              return 0;
  
          // 1 score, thatMove is at border +1
          if (((row >= 2 & row <= 4) & col == 1))
              return 1;
          else if (((row >= 2 & row <= 4) & col == 5))
              return 1;
          else if ((row == 1 & (col >= 1 & col <= 5)))
              return 1;
          else if ((row == 5 & (col >= 1 & col <= 5)))
              return 1;
  
          // 2 score, thatMove is at border +2
          if ((row == 2 & col == 2))
              return 2;
          else if ((row == 2 & col == 4))
              return 2;
          else if ((row == 2 & (col >= 2 & col <= 4)))
              return 2;
          else if ((row == 4 & (col >= 2 & col <= 4)))
              return 2;
  
          // 3 Center thatMove 
          if ((row == 3 & col <= 3))
              return 3;
  
          return 0; // error not added lane
      }
  
      private static int eval(char[,] b)
      {
          int playerScorerow = 0;
          int playerScorecol = 0;
          int playerScorecross = 0;
          int pcScorerow = 0;
          int pcScorecol = 0;
          int pcScorecross = 0;
  
          // 'EVALUATE rows 
          for (int row = 0; row <= 3; row++)
          {
              for (int col = 0; col <= 6; col++)
              {
                  // initialize moves to evaluate
                  Move move3 = new Move()
                  {
                      row = row + 3,
                      col = col
                  };
                  Move move2 = new Move()
                  {
                      row = row + 2,
                      col = col
                  };
                  Move move1 = new Move()
                  {
                      row = row + 1,
                      col = col
                  };
                  Move move0 = new Move()
                  {
                      row = row,
                      col = col
                  };
  
                  if (!b[row, col] == " ")
                  {
                      int moveScore = AddScoreToMove(move0); // EVALUATE THAT MOVE 
                      if (b[row, col] == b[row + 1, col])
                      {
                          int move1Score = AddScoreToMove(move1);
                          if (b[row + 1, col] == b[row + 2, col])
                          {
                              int move2Score = AddScoreToMove(move2);
                              if (b[row + 2, col] == b[row + 3, col])
                              {
                                  int move3Score = AddScoreToMove(move3);
                                  if (b[row, col] == player)
                                      playerScorerow = Math.Max(playerScorerow, 100 + move3Score + move2Score + move1Score + moveScore); // GET HIGHEST OF ALL EVALUATIONS OF THAT FOR LOOPS
                                  else if (b[row, col] == opponent)
                                      pcScorerow = Math.Min(pcScorerow, -100 - move3Score - move2Score - move1Score - moveScore);
                              }
                              if (b[row, col] == player)
                                  playerScorerow = Math.Max(playerScorerow, 5 + move2Score + move1Score + moveScore);
                              else if (b[row, col] == opponent)
                                  pcScorerow = Math.Min(pcScorerow, -5 - move2Score - move1Score - moveScore);
                          }
                          if (b[row, col] == player)
                              playerScorerow = Math.Max(playerScorerow, 2 + move1Score + moveScore);
                          else if (b[row, col] == opponent)
                              pcScorerow = Math.Min(pcScorerow, -2 - move1Score - moveScore);
                      }
                      if (b[row, col] == player)
                          playerScorerow = Math.Max(playerScorerow, moveScore);
                      else if (b[row, col] == opponent)
                          pcScorerow = Math.Min(pcScorerow, -moveScore);
                  }
              }
          }
  
          // 'col win
          for (int row = 0; row <= 6; row++)
          {
              for (int col = 0; col <= 3; col++)
              {
                  Move move3 = new Move()
                  {
                      row = row + 3,
                      col = col
                  };
                  Move move2 = new Move()
                  {
                      row = row + 2,
                      col = col
                  };
                  Move move1 = new Move()
                  {
                      row = row + 1,
                      col = col
                  };
                  Move move0 = new Move()
                  {
                      row = row,
                      col = col
                  };
                  if (!b[row, col] == " ")
                  {
                      int moveScore = AddScoreToMove(move0);
                      if (b[row, col] == b[row, col + 1])
                      {
                          int moveScore1 = AddScoreToMove(move1);
                          if (b[row, col + 1] == b[row, col + 2])
                          {
                              int moveScore2 = AddScoreToMove(move2);
                              if (b[row, col + 2] == b[row, col + 3])
                              {
                                  int moveScore3 = AddScoreToMove(move3);
                                  if (b[row, col] == player)
                                      playerScorerow = Math.Max(playerScorerow, 100 + moveScore3 + moveScore2 + moveScore1 + moveScore);
                                  else if (b[row, col] == opponent)
                                      pcScorerow = Math.Min(pcScorerow, -100 - moveScore3 - moveScore2 - moveScore1 - moveScore);
                              }
                              if (b[row, col] == player)
                                  playerScorerow = Math.Max(playerScorerow, 5 + moveScore2 + moveScore1 + moveScore);
                              else if (b[row, col] == opponent)
                                  pcScorerow = Math.Min(pcScorerow, -5 - moveScore2 - moveScore1 - moveScore);
                          }
                          if (b[row, col] == player)
                              playerScorerow = Math.Max(playerScorerow, 2 + moveScore1 + moveScore);
                          else if (b[row, col] == opponent)
                              pcScorerow = Math.Min(pcScorerow, -2 - moveScore1 - moveScore);
                      }
                      if (b[row, col] == player)
                          playerScorerow = Math.Max(playerScorerow, moveScore);
                      else if (b[row, col] == opponent)
                          pcScorerow = Math.Min(pcScorerow, -moveScore);
                  }
              }
          }
  
          // NOT FULLY IMPLEMENTED
          // cross win
          for (int row = 0; row <= 3; row++)
          {
              for (int col = 0; col <= 3; col++)
              {
                  if (!b[row, col] == " ")
                  {
                      if ((b[row, col] == b[row + 1, col + 1] && b[row + 1, col + 1] == b[row + 2, col + 2] && b[row + 2, col + 2] == b[row + 3, col + 3]))
                      {
                          if (b[row, col] == player)
                              return +10;
                          else if (b[row, col] == opponent)
                              return -10;
                      }
                  }
              }
          }
  
          // NOT FULLY IMPLEMENTED
          // cross win
          for (int row = 0; row <= 3; row++)
          {
              for (int col = 3; col <= 6; col++)
              {
                  if (!b[row, col] == " ")
                  {
                      if ((b[row, col] == b[row + 1, col - 1] && b[row + 1, col - 1] == b[row + 2, col - 2] && b[row + 2, col - 2] == b[row + 3, col - 3]))
                      {
                          if (b[row, col] == player)
                              return +10;
                          else if (b[row, col] == opponent)
                              return -10;
                      }
                  }
              }
          }
  
  
          int[] scoreValues = new[] { playerScorerow, playerScorecol, playerScorecross, pcScorerow, pcScorecol, pcScorecross };
          var max = scoreValues.OrderByDescending(z => Math.Abs(z)).FirstOrDefault();
  
          return max;
      }
  
      private static int MiniMax(char[,] board, bool machineMove, int depth)
      {
          const int alpha = -10_000;
          const int beta = 10_000;
          return AlphaBetaPruning(board, machineMove, depth, beta, alpha);
      }
  
      private static int AlphaBetaPruning(char[,] board, bool machineMove, int depth, int beta, int alpha)
      {
          if (depth == 0)
              return eval(board);
          if (machineMove)
          {
              for (int i = 0; i <= 6; i++)
              {
                  for (int j = 0; j <= 6; j++)
                  {
                      if (board[i, j] == " ")
                      {
                          board[i, j] = opponent;
                          int score = Math.Min(AlphaBetaPruning(board, !machineMove, depth - 1, beta, alpha), eval(board));
                          board[i, j] = " ";
                          if (score < beta)
                          {
                              Form1.BestMoveRow = i;
                              Form1.BestMoveCol = j;
                              Form1.BestMoveScore = score;
                              beta = score;
                          }
                          if (alpha >= beta)
                              break; // cutoff
                      }
                  }
              }
              return beta;
          }
          else
          {
              for (int i = 0; i <= 6; i++)
              {
                  for (int j = 0; j <= 6; j++)
                  {
                      if (board[i, j] == " ")
                      {
                          board[i, j] = player;
                          int score = Math.Max(AlphaBetaPruning(board, !machineMove, depth - 1, beta, alpha), eval(board));
                          board[i, j] = " ";
                          if (score > alpha)
                              alpha = score;
                          if (alpha >= beta)
                              break;
                      }
                  }
              }
              return alpha;
          }
      }
  }
  
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  and the code

  # This Python file uses the following encoding: utf-8
  import sys, os
  from random import randint
  from PySide2 import QtCore, QtGui
  from PySide2.QtWidgets import *
  from PySide2.QtCharts import *
  from PySide2.QtGui import QPainter, QKeySequence, QColor
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          super().drawForeground(painter, rect)
          sceneRect = self.sceneRect()
          painter.setClipRect(rect)
          painter.setPen(self.pen)
          painter.drawLine(self.m_MousePos.x(), sceneRect.top(), self.m_MousePos.x(), sceneRect.bottom())
  
  
      def mouseMoveEvent(self, event):
          newMousePos = QPoint(event.x(),event.y())
          if(self.m_MousePos != newMousePos):
              self.m_MousePos = QPoint(event.x(),event.y())
              super().mouseMoveEvent(event)
  
  class MainWindow(QMainWindow):
  
      def __init__(self):
          QMainWindow.__init__(self)
  
          widget = QWidget()
          self.setCentralWidget(widget)
  
          self.currentFileIndex = 0
          self.Signal1Data = []
          self.Signal2Data = []
          self.selectedPoints = []
  
          self.chart = QtCharts.QChart()
          self.updateChart()
          self.chartView = Derived(self.chart)#QtCharts.QChartView(self.chart)#Derived(self.chart)
          self.chartView.setMouseTracking(True)
  
          self.chartView.setRubberBand(QtCharts.QChartView.HorizontalRubberBand)
          self.chartView.setRenderHint(QPainter.Antialiasing)
          self.loadSignalFile()
  
          self.removeLastButton = QPushButton(self.tr("Remove last point"))
          self.removeLastButton.clicked.connect(self.popSelectedPoint)
  
          layout =  QGridLayout()
          self.instructionLabel = QLabel(self.tr("Start by identifying feature (mouse click on signal)"))  
          font = QtGui.QFont( "Arial", 18, QtGui.QFont.Bold)
          self.instructionLabel.setFont(font)
          layout.addWidget(self.instructionLabel, 0, 0 )
  
          layout.addWidget(self.chartView, 1, 0, 1, 2)
          layout.addWidget(self.chartView, 1, 0, 1, 2)
          layout.addWidget(self.removeLastButton, 2, 0)
          widget.setLayout(layout)
  
          self.statusBar().showMessage("message")
  
          self.setWindowTitle(self.tr("Feature Identifier"))
          self.setMinimumSize(160, 160)
          self.resize(800, 600)
  
      def updateChart(self):
          self.chart.removeAllSeries()
          self.Signal1LineSeries = QtCharts.QLineSeries()
          self.Signal2LineSeries = QtCharts.QLineSeries()
          self.Signal1LineSeries.setName("1")
          self.Signal2LineSeries.setName("2")
  
          pen = QtGui.QPen()
          pen.setWidth(3)
          pen.setColor(QColor("red"))
          self.Signal1LineSeries.setPen(pen)
          pen.setColor(QColor("royalblue"))
          self.Signal2LineSeries.setPen(pen)
  
          self.SelectedPointsSeries = QtCharts.QScatterSeries()
          self.SelectedPointsSeries.setName("Selected points")
          self.SelectedPointsSeries.setMarkerSize(10.0)
          pen.setColor(QColor("green"))
          pen.setWidth(1)
          self.SelectedPointsSeries.setPen(pen)
  
          dataPoints = [QtCore.QPointF(i+1, self.Signal1Data[i]) for i in range(len(self.Signal1Data))]
          self.Signal1LineSeries.replace(dataPoints)
  
          dataPoints = [QtCore.QPointF(i+1, self.Signal2Data[i]) for i in range(len(self.Signal2Data))]
          self.Signal2LineSeries.replace(dataPoints)
  
          self.Signal1LineSeries.clicked.connect(self.on_clicked1)
          self.Signal2LineSeries.clicked.connect(self.on_clicked2)
          
          self.chart.addSeries(self.Signal1LineSeries)
          self.chart.addSeries(self.Signal2LineSeries)
          self.addSelectedPoints()
          self.chart.addSeries(self.SelectedPointsSeries)
          
          self.chart.createDefaultAxes()
          self.chart.setTitle("Title")
  
      def verifyClick(self, series, p, threshold=2):
          xIndex = round(p.x())
          diff = p.y()- series.pointsVector()[xIndex].y()
          if abs( diff ) < threshold:
              return xIndex
  
      @QtCore.Slot()
      def on_clicked2(self, p):
          #check if acquiring click on signal 2
          x = self.verifyClick(self.Signal2LineSeries, p)
          if x is not None:
              print("2 clicked: ", x)
              self.recordSelectedPoint(int(x), self.Signal2LineSeries)
              self.updateChart()
  
      @QtCore.Slot()
      def on_clicked1(self, p):
          #check if acquiring click on Pd
          x = self.verifyClick(self.Signal1LineSeries, p)
          if x is not None:
              print("1 clicked: ", x)
              self.recordSelectedPoint(int(x), self.Signal1LineSeries)
              self.updateChart()
  
      def recordSelectedPoint(self, i, lineSeries):
          self.selectedPoints.append(QPointF(i, lineSeries.at(i).y()))
  
      def addSelectedPoints(self):
          self.SelectedPointsSeries.replace(self.selectedPoints)
  
      def loadSignalFile(self):
          self.Signal1Data = []
          self.Signal2Data = []
  
          for row in range(1200):
              self.Signal1Data.append(math.sin(row/125))
              self.Signal2Data.append(math.sin((row+25)/125))
          self.updateChart()
  
      @QtCore.Slot()
      def popSelectedPoint(self):
          self.selectedPoints.pop()
          self.loadSignalFile()
  
  if __name__ == "__main__":
  
      app = QApplication([])
      window = MainWindow()
      window.show()
  
  
      sys.exit(app.exec_())
  

  ---EDIT---

  Seems the cursor only moves when it is over a signal line! How can I correct that?