rsindex (Financial Time Series Toolbox)

Relative Strength Index (RSI)

Syntax

rsi = rsindex(closep, nperiods)
rsits = rsindex(tsobj, nperiods)
rsits = rsindex(tsobj, nperiods, ParameterName, ParameterValue)

Arguments

closep
Vector of closing prices

nperiods
(Optional) Number of periods. Default = 14.

tsobj
Financial time series object

`closep`	Vector of closing prices
`nperiods`	(Optional) Number of periods. Default = 14.
`tsobj`	Financial time series object

Description

rsi = rsindex(closep, nperiods) calculates the Relative Strength Index (RSI) from the closing price vector closep.

rsits = rsindex(tsobj, nperiods) calculates the RSI from the closing price series in the financial time series object tsobj. The object tsobj must contain at least the series Close, representing the closing prices. The output rsits is a financial time series object whose dates are the same as tsobj and whose data series name is RSI.

rsits = rsindex(tsobj, nperiods, ParameterName, ParameterValue) accepts a parameter name/parameter value pair as input. This pair specifies the name for the required data series if it is different from the expected default name. The valid parameter name is

CloseName: closing prices series name

The parameter value is the string that represents the valid parameter name.

Examples

Compute the RSI for Disney stock and plot the results:

load disney.mat
dis_RSI = rsindex(dis)
plot(dis_RSI)
title('Relative Strength Index for Disney')

See Also

negvolidx, posvolidx

Reference

Murphy, John J., Technical Analysis of the Futures Market, New York Institute of Finance, 1986, pp. 295 - 302.

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