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Beta: Indicator Documentation


public Beta(Bars bars, Bars index, int period)

Parameter Description

bars Primary Bars object
index The Bars object for your index symbol
period Lookback period


According to definition at Investopedia, beta coefficient is a measure of the volatility (risk) of a security or a portfolio in comparison to the market as a whole.

Here we are using ^GSPC symbol of the S&P500 Index, suitable for Yahoo! data. Look in the code below for the Fidelity data symbol.


using System; using System.Collections.Generic; using System.Text; using System.Drawing; using WealthLab; using WealthLab.Indicators; using Community.Indicators;

namespace WealthLab.Strategies { public class MyStrategy : WealthScript { protected override void Execute() { Beta beta = Beta.Series( Bars, GetExternalSymbol("^GSPC",true),200); // Yahoo symbol //Beta beta = Beta.Series( Bars, GetExternalSymbol(".SPX",true),200); // Fidelity symbol ChartPane betatest = CreatePane( 30, true, true ); PlotSeries( betatest, beta, Color.DarkMagenta, LineStyle.Solid, 2 ); } } }

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