Indicators
RadChartView offers more than 20 of the most frequently used technical indicators out of the box. The indicators compilation contains representatives of the moving average, momentum, volatility, and band categories. In their essence, indicators are line series that calculate each of their values using predefined interpretations of the incoming data. The simplest example would be the Moving Average, aka. Simple Moving Average, indicator, which averages the data for a certain number of past days. Each indicator type introduces a specific set of properties that allows you to change the parameters of the built-in formula. This article demonstrates how to setup two of the most popular indicators - Moving Average (MA) and Bollinger Bands.
Let's start with creating some meaningful data that will be used by both indicators
Initial Setup
//Create data
BindingList<OhlcObject> dataSource = new BindingList<OhlcObject>();
dataSource.Add(new OhlcObject(7, 8, 2, 4, DateTime.Now));
dataSource.Add(new OhlcObject(6, 7, 1, 7, DateTime.Now.AddDays(1)));
dataSource.Add(new OhlcObject(8, 9, 2, 4, DateTime.Now.AddDays(2)));
dataSource.Add(new OhlcObject(5, 5, 2, 2, DateTime.Now.AddDays(3)));
dataSource.Add(new OhlcObject(5, 8, 5, 6, DateTime.Now.AddDays(4)));
dataSource.Add(new OhlcObject(5, 7, 1, 7, DateTime.Now.AddDays(5)));
dataSource.Add(new OhlcObject(2, 5, 2, 4, DateTime.Now.AddDays(6)));
dataSource.Add(new OhlcObject(5, 5, 2, 3, DateTime.Now.AddDays(7)));
dataSource.Add(new OhlcObject(5, 8, 5, 7, DateTime.Now.AddDays(8)));
Moving Average Indicator
Each value of MA is the average of past n days, where n is a parameter defined by the Period property.
Average Indicator
//Create and add Moving Average indicator
MovingAverageIndicator maIndicator = new MovingAverageIndicator();
maIndicator.ValueMember = "Close";
maIndicator.CategoryMember = "Date";
maIndicator.DataSource = dataSource;
maIndicator.Period = 2;
maIndicator.BorderColor = Color.Red;
maIndicator.PointSize = SizeF.Empty;
this.radChartView1.Series.Add(maIndicator);
//Create and add Ohlc series
OhlcSeries series = new OhlcSeries();
series.OpenValueMember = "Open";
series.CloseValueMember = "Close";
series.HighValueMember = "High";
series.LowValueMember = "Low";
series.CategoryMember = "Date";
series.DataSource = dataSource;
series.BorderColor = Color.Black;
this.radChartView1.Series.Add(series);
Figure 1: Average Indicator
Bollinger Bands Indicator
The indicator consists of two bands that aim to provide a relative definition of high and low. The indicator uses a simple Moving Average as a starting point and forms its two bands using the following formulas:
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Upper band: N-period MA + (N-period standard deviation * K)
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Lower band: N-period MA – (N-period standard deviation * K)
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N is defined by the Period property. A typical value for N is 20.
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K is defined by the StandardDeviations property. A typical value for K is 2.
Bollinger Indicator
//Create and add Bollinger Bands indicator
BollingerBandsIndicator bollIndicator = new BollingerBandsIndicator();
bollIndicator.ValueMember = "Close";
bollIndicator.CategoryMember = "Date";
bollIndicator.DataSource = dataSource;
bollIndicator.StandardDeviations = 2;
bollIndicator.Period = 5;
bollIndicator.InnerIndicator.BorderColor = Color.DarkGray;
bollIndicator.BorderColor = Color.Red;
bollIndicator.PointSize = SizeF.Empty;
this.radChartView1.Series.Add(bollIndicator);
//Create and add Ohlc series
OhlcSeries ohlcSeries = new OhlcSeries();
ohlcSeries.OpenValueMember = "Open";
ohlcSeries.CloseValueMember = "Close";
ohlcSeries.HighValueMember = "High";
ohlcSeries.LowValueMember = "Low";
ohlcSeries.CategoryMember = "Date";
ohlcSeries.DataSource = dataSource;
ohlcSeries.BorderColor = Color.Black;
this.radChartView1.Series.Add(ohlcSeries);
Figure 2: Bollinger Indicator
