BollingerBandsIndicator.PointsCount Property
Gets or sets the number of data points used to calculate the simple moving average and standard deviation.
Namespace: DevExpress.XamarinForms.Charts
Assembly: DevExpress.XamarinForms.Charts.dll
NuGet Package: DevExpress.XamarinForms.Charts
Declaration
public int PointsCount { get; set; }
Property Value
Type | Description |
---|---|
Int32 | The number of points. |
Example
This example demonstrates how to build a Bollinger Bands indicator for Close prices of a stock series.
- Add the BollingerBandsIndicator object to the chart’s collection of series (ChartView.Series).
- 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.
- 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 simple moving average and standard deviation. - Use the StandardDeviationMultiplier property to specify the number of standard deviations that define the distance between the moving average (middle band) and the upper/lower band.
<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:BollingerBandsIndicator ValueLevel="Close"
PointsCount="20"
StandardDeviationMultiplier="2"
DisplayName="Bollinger Bands 20">
<dxc:BollingerBandsIndicator.Data>
<dxc:CalculatedSeriesDataAdapter Series="{Binding Series[0], Source={x:Reference chart}}"/>
</dxc:BollingerBandsIndicator.Data>
</dxc:BollingerBandsIndicator>
</dxc:ChartView.Series>
</dxc:ChartView>
See Also