DXWilliamsRIndicator Class

The Williams %R oscillator indicator.

Namespace: DevExpress.Xamarin.iOS.Charts

Assembly: DevExpress.Xamarin.iOS.Charts.dll

Declaration

public class DXWilliamsRIndicator :
    DXCalculatedSeries

Remarks

This indicator looks as follows:

Williams %R Indicator Sample

How to: Specify Indicator Data

This example demonstrates how to implement the calculated series' data source:

// In the ViewDidLoad method.
DXStockSeries stockSeries = InitStock();
this.chart.AddSeries(stockSeries);
this.indicatorChart.AddSeries(
    new DXWilliamsRIndicator {
        Data = new CalculatedSeriesData(stockSeries),
        PointsCount = 14,
        DisplayName = "RSI",
        ValueLevel = DXValueLevel.Close,
        LegendTextPattern = "{S} (14)",
        ShowInLegend = true
    }
);
// ...

public class CalculatedSeriesData: DXCalculatedSeriesData {
    DXSeries series;    
    public CalculatedSeriesData(DXSeries series) {
        this.series = series;
    }
    public override DXSeries Source => series;
}

The code above uses the classes and members below:

Symbol

Description

DXWilliamsRIndicator

The Williams %R oscillator indicator.

DXSeries.Data

Gets or sets data the series display on the Chart.

DXWilliamsRIndicator.PointsCount

IMPORTANT

The indicator requires the DXFinancialSeriesData type of the source series' data, because this indicator utilizes High, Low, and Close values to calculate indicator point values.

How to: Configure Indicator Hint Options

The chart Hint interacts with series to request values to display, to ask series what axis lines the Crosshair should display, etc:

Hint Options Sample

The following code specifies how the hint displays the series:

series.HintOptions = new DXSeriesCrosshairOptions {
    PointTextPattern = "{S}: {V$#.#}",
    ShowInLabel = true,
    AxisLineHidden = false,
    AxisLabelHidden = false,
};

The series can utilize the classes and properties below to configure how the hint displays it:

Symbol

Description

HintOptions

DXSeriesCrosshairOptions

DXSeriesHintOptionsBase.PointTextPattern

DXSeriesCrosshairOptions.ShowInLabel

DXSeriesCrosshairOptions.AxisLineHidden

DXSeriesCrosshairOptions.AxisLabelHidden

NOTE

Properties the DXSeriesCrosshairOptions class introduces do not affect the hint when the hint's Behavior is set to DXTooltipHintBehavior. At the same time, all properties the class inherits from its parent influence the hint.

How to: Manage the Indicator Appearance

The series style provides the following parameters that specify a series' appearance:

Area Series Appearance

The code below customizes the Williams' %R indicator's appearance:

indicator.Style = new DXLineIndicatorStyle {
    Stroke = UIColor.FromRGB(0.898f, 0.224f, 0.208f),
    StrokeThickness = 3,
};

This code utilizes the following classes and members:

Symbol

Description

DXWilliamsRIndicator.Style

DXLineIndicatorStyle

DXLineIndicatorStyle.Stroke

DXLineIndicatorStyle.StrokeThickness

Implements

IEquatable<Foundation.NSObject>
Foundation.INSObjectProtocol
ObjCRuntime.INativeObject

Inheritance

Object
Foundation.NSObject
See Also