How to: Add an Additional Legend to a Chart
To add an additional legend to a chart, create a new instance of the Legend class and add it to the ChartControl.Legends collection. Configure its Legend.DockTarget, Legend.AlignmentVertical and Legend.AlignmentHorizontal properties to position the legend to the required place.
Note
Note that the legend will not be shown until it is assigned to the SeriesBase.Legend, Indicator.Legend, ConstantLine.Legend or Strip.Legend property.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/how-to-add-an-additional-legend-to-a-chart-t375201
// Create a new instance of Legend.
Legend macdLegend = new Legend();
chart.Legends.Add(macdLegend);
// Position it.
macdLegend.DockTarget = diagram.Panes.GetPaneByName("macdPane");
macdLegend.AlignmentHorizontal = LegendAlignmentHorizontal.Left;
macdLegend.AlignmentVertical = LegendAlignmentVertical.Top;
// Assign the data displayed in legend.
macd.Legend = macdLegend;