Hi,

At that moment that are not such kind of option, but maybe you could use one of these two options:

- Option 1:  Using StepLineChart, but with formatting of your X axis. For example:

dt.Rows.Add(DateTime.Today.AddYears(1500).AddYears(- DateTime.Today.Year), 2);
dt.Rows.Add(DateTime.Today.AddYears(2000).AddYears(-DateTime.Today.Year), 20);
dt.Rows.Add(DateTime.Today.AddYears(3500).AddYears(-DateTime.Today.Year), 30);
dt.Rows.Add(DateTime.Today.AddYears(4000).AddYears(-DateTime.Today.Year), 40);
dt.Rows.Add(DateTime.Today.AddYears(4500).AddYears(-DateTime.Today.Year), 50);
 
ultraChart1.Axis.X.TimeAxisStyle.TimeAxisStyle = Infragistics.UltraChart.Shared.Styles.RulerGenre.Discrete;
ultraChart1.Axis.X.TickmarkIntervalType = Infragistics.UltraChart.Shared.Styles.AxisIntervalType.Years;
ultraChart1.Axis.X.Labels.ItemFormat = Infragistics.UltraChart.Shared.Styles.AxisItemLabelFormat.Custom;
ultraChart1.Axis.X.Labels.ItemFormatString = "<ITEM_LABEL:yyyy>";
            
ultraChart1.DataSource = dt;

Option 2: Using a ScatterChart with property ConnectWithLines = true. By this way you could achieve similar result with small exceptions. Please take a look at the screenshot (red area).

Please if you have any questions, do not hesitate to write us

Regards