Functions to add technical indicators to a chart.
Called for its side effects, an object to class chobTA
will be returned invisibly. If called from the R command line the method will draw the appropriate indicator on the current chart.
Jeffrey A. Ryan
The general mechanism to add technical analysis studies or overlays
to a financial chart created with chartSeries.
Functionality marked with a ‘*’ is via the TTR package.
General TA charting tool functions:
addTAadd data as custom indicator
dropTAremove technical indicator
moveTAmove a technical indicator
swapTAswap two technical indicators
Current technical indicators include:
addADXadd Welles Wilder's Directional Movement Indicator*
addATRadd Average True Range *
addAroonadd Aroon Indicator *
addAroonOscadd Aroon Oscillator *
addBBands:add Bollinger Bands *
addCCIadd Commodity Channel Index *
addCMFadd Chaiken Money Flow *
addChADadd Chaiken Accumulation Distribution Line *
addChVoladd Chaiken Volatility *
addCMOadd Chande Momentum Oscillator *
addDEMAadd Double Exponential Moving Average *
addDPOadd Detrended Price Oscillator *
addEMAadd Exponential Moving Average *
addEMVadd Arm's Ease of Movement *
addEnvelopeadd Moving Average Envelope
addEVWMAadd Exponential Volume Weighted Moving Average *
addExpiryadd options or futures expiration lines
addKSTadd Know Sure Thing *
addLinesadd line(s)
addMACD:add Moving Average Convergence Divergence *
addMFIadd Money Flow Index *
addMomentumadd Momentum *
addOBVadd On-Balance Volume *
addPointsadd point(s)
addROC:add Rate of Change *
addRSIadd Relative Strength Indicator *
addSARadd Parabolic SAR *
addSMAadd Simple Moving Average *
addSMIadd Stochastic Momentum Index *
addTDIadd Trend Direction Index *
addTRIXadd Triple Smoothed Exponential Oscillator *
addVoadd Volume if available
addVolatilityadd volatility *
addWMAadd Weighted Moving Average *
addWPRadd Williams Percent R *
addZigZagadd Zig Zag *
addZLEMAadd ZLEMA *
See the individual functions for specific implementation and argument details. Details of the underlying TTR implementations can be found in TTR.
The primary changes between the add*** version of an indicator and the TTR base function is the absense of the data argument in the former.
Notable additions include on, with.col.
Josh Ulrich - TTR package