ExponentialMovingAverageIndicator Class

An exponential moving average (EMA) indicator.

Namespace: DevExpress.XamarinForms.Charts

Assembly: DevExpress.XamarinForms.Charts.dll

NuGet Package: DevExpress.XamarinForms.Charts

Declaration

public class ExponentialMovingAverageIndicator :
    CalculatedSeries

Remarks

This indicator looks as follows:

ChartView also supports the following Moving Average indicators:

• Simple Moving Average (SMA)
• Weighted Moving Average (WMA)
• Triangular Moving Average (TMA)

Add an Indicator to a Series

This example demonstrates how to build a exponential moving average indicator for Close values of a stock series.

1. Add the ExponentialMovingAverageIndicator object to the chart’s collection of series (ChartView.Series).
2. Set the indicator’s Data property to a CalculatedSeriesDataAdapter class instance. Use this object’s Series property to specify a series for which the indicator should be calculated.
3. Use the ValueLevel and PointsCount properties to specify the price level of a financial series point and the number of data points used to calculate the indicator.

Xaml

<dxc:ChartView x:Name="chart">
    <dxc:ChartView.Series>
        <dxc:StockSeries>
            <dxc:StockSeries.Data>
                <dxc:SeriesDataAdapter DataSource="{Binding StockPrices}" ArgumentDataMember="Date">
                    <dxc:ValueDataMember Type="High" Member="High" />
                    <dxc:ValueDataMember Type="Low" Member="Low" />
                    <dxc:ValueDataMember Type="Open" Member="Open" />
                    <dxc:ValueDataMember Type="Close" Member="Close" />
                </dxc:SeriesDataAdapter>
            </dxc:StockSeries.Data>
        </dxc:StockSeries>

        <dxc:ExponentialMovingAverageIndicator> 
                ValueLevel="Close" 
                PointsCount="20" 
                DisplayName="EMA 20">
            <dxc:ExponentialMovingAverageIndicator.Data>
                <dxc:CalculatedSeriesDataAdapter Series="{Binding Series[0], Source={x:Reference chart}}"/>
            </dxc:ExponentialMovingAverageIndicator.Data>
        </dxc:ExponentialMovingAverageIndicator>
    </dxc:ChartView.Series>
</dxc:ChartView>

Customize Indicator Appearance

To change the indicator line appearance, set the ExponentialMovingAverageIndicator.Style property to the LineIndicatorStyle object with the specified Stroke and StrokeThickness properties.

Xaml

<dxc:ExponentialMovingAverageIndicator>
    <dxc:ExponentialMovingAverageIndicator.Style>
        <dxc:LineIndicatorStyle Stroke="#9859c9"/>
    </dxc:ExponentialMovingAverageIndicator.Style>

    <!--Indicator Data-->
</dxc:ExponentialMovingAverageIndicator>

Implements

INotifyPropertyChanged

Inheritance

Object

ChartSeriesElement

SeriesBase

Series

CalculatedSeries

ExponentialMovingAverageIndicator