TrendLine.ExtrapolateToNegativeInfinity Property

Specifies whether the Trend Line is extrapolated to negative infinity.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v25.1.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public bool ExtrapolateToNegativeInfinity { get; set; }

VB.NET

Public Property ExtrapolateToNegativeInfinity As Boolean

Property Value

Type	Description
Boolean	true to extrapolate the Trend Line to negative infinity; otherwise, false.

Remarks

The chart automatically extrapolates the Trend Line to infinity (beyond the point’s argument in the positive direction of the axis). You can also extrapolate the Trend Line to negative infinity or limit the Trend Line to its points.

Set the TrendLine.ExtrapolateToInfinity property to false to limit the Trend Line to the point.

Set the ExtrapolateToNegativeInfinity property to true to extrapolate the Trend Line to negative infinity.

Example

The example below illustrates the stock chart with the ExtrapolateToNegativeInfinity property set to true. The chart extrapolates the current Trend Line beyond the start and end point’s arguments.

The following markup shows how to add the Trend Line to the chart:

Window1.xaml

<Window x:Class="Stock2DChart.Window1" 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts" 
        xmlns:local="clr-namespace:Stock2DChart"/>

<dxc:ChartControl Name="chartControl1">
      <dxc:XYDiagram2D>
          <dxc:StockSeries2D ArgumentScaleType="DateTime" 
                              DataSource="{Binding Data}" 
                              ArgumentDataMember="Date"
                              OpenValueDataMember="Open"
                              HighValueDataMember="High"
                              LowValueDataMember="Low"
                              CloseValueDataMember="Close">
              <!--region #Trend Line-->
              <dxc:StockSeries2D.Indicators>
                  <dxc:TrendLine x:Name="trendLine1"
                                  Argument1="1/2/2019"
                                  Argument2="1/4/2019"
                                  ValueLevel1="High"
                                  ValueLevel2="High"
                                  ExtrapolateToNegativeInfinity="True" />
              </dxc:StockSeries2D.Indicators>
              <!--endregion #Trend Line-->
              </dxc:StockSeries2D>
          </dxc:XYDiagram2D>
</dxc:ChartControl>

Refer to the following topic for more information: Trend Lines.