Oscilloscope "moving effect" lookalike

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (_run)
            {
                for (int i = _index; i < _xValues.Count; i++)
                {
                    chart1.Series[0].Points.AddY(_xValues[i]);
                    if (chart1.Series[0].Points.Count > 100)
                    {
                        chart1.Series[0].Points.RemoveAt(0);
                    }
                }
                _index = _xValues.Count + 1;
            }
        }