There are, of course, other ways to achieve the window movement. For example David was explaining you could accomplish something by hard coding the range of the x axis, and then you would just need to make sure the "current" entries were the only ones to fall in that range and be displayed. If you can provide more information about the format of your data source and how you are obtaining it for this updating display, we could further advise.

I was hoping there would be a cleaner solution than that.  I need to keep a reference of all the values and just show the most recent entries.  I guess I will need to maintain a separate DataTable in addition to the DataSource to achieve this?

Here is some sample code behind:

public partial class Form1 : Form

    {

        private Timer _timer;

        private DataTable _data;

        private Random _rand = new Random();

        public Form1()

        {

            InitializeComponent();

            _timer = new Timer();

            _timer.Interval = 1000;

            _timer.Tick += new EventHandler(timer_Tick);

            _timer.Enabled = true;

            _data = new DataTable();

            _data.Columns.Add(new DataColumn("Timestamp", typeof(DateTime)));

            _data.Columns.Add(new DataColumn("Value", typeof(double)));

            for (int i = 0; i < 60; i++)

            {

                AddNewListItem();

            }

            ultraChart1.DataSource = _data;

            ultraChart1.Data.SwapRowsAndColumns = true;

            ultraChart1.DataBind();

        }

        void AddNewListItem()

        {

            DataRow dr = _data.NewRow();

            dr["Timestamp"] = DateTime.Now;

            dr["Value"] = _rand.NextDouble() * 100.00;

            _data.Rows.Add(dr);

            if (_data.Rows.Count > 60)

            {

                _data.Rows.RemoveAt(0);

            }

        }

        void timer_Tick(object sender, EventArgs e)

        {

            AddNewListItem();

        }

    }

-Graham