Someone

this.chart = new RadChart();
this.chart.PlotArea.XAxis.AutoScale = false;
this.chart.PlotArea.XAxis.MinValue = DateTime.Now.Date.ToOADate();
this.chart.PlotArea.XAxis.MaxValue = DateTime.Now.AddYears(1).Date.ToOADate();
this.chart.PlotArea.XAxis.Step = 30;
this.chart.PlotArea.XAxis.Appearance.LabelAppearance.RotationAngle = 90.0F;
this.chart.PlotArea.XAxis.Appearance.ValueFormat = Telerik.Charting.Styles.ChartValueFormat.ShortDate;
this.Controls.Add(this.chart);

ChartSeries series = new ChartSeries();
series.Type = ChartSeriesType.Point;

series.Items.Add(new ChartSeriesItem(DateTime.Now.AddDays(10.0).ToOADate(), 10));
series.Items.Add(new ChartSeriesItem(DateTime.Now.AddDays(25.0).ToOADate(), 20));
series.Items.Add(new ChartSeriesItem(DateTime.Now.AddDays(50.0).ToOADate(), 30));
series.Items.Add(new ChartSeriesItem(DateTime.Now.AddDays(100.0).ToOADate(), 110));
series.Items.Add(new ChartSeriesItem(DateTime.Now.AddDays(300.0).ToOADate(), 60));
series.Items.Add(new ChartSeriesItem(DateTime.Now.AddDays(130.0).ToOADate(), 10));
series.Items.Add(new ChartSeriesItem(DateTime.Now.AddDays(150.0).ToOADate(), 30));
series.Items.Add(new ChartSeriesItem(DateTime.Now.AddDays(230.0).ToOADate(), 200));

this.chart.Series.Add(series);