chartSeries() and addTA() from within an S4 method

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Hi Lorenzo,

add*** functions need to work 'magically' from the command line _and_
from within the chartSeries (or calls in general), so there is a check
of where it is called from to determine _when_ it does the drawing.

Simply change addTA(mktPositions) plot(addTA(mktPositions)), to cause
the TA to be draw.

HTH
Jeff

On Fri, Dec 12, 2008 at 12:07 PM, Lorenzo Bertolini
Hello list,

wonder if anyone can help me out. I want to call chartSeries() and
subsequently addTA() from within an S4 method.
The chartSeries() works, but the addTA() does not....

setMethod("plot", "TradingSystem_FX", function(x){
..
..
                   # plot fx timeseries
                   x11()
                   fxSeries = as.quantmod.OHLC(seriesFX,col.names="Close")

chartSeries(fxSeries,theme="white",TA="addEMA(200,col=4)",name=seriesName)

                   #plot marketposition
                   addTA(mktPositions)

..

                   })

Thanks and have a nice WE,

Lorenzo Bertolini

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Jeffrey Ryan
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ia: insight algorithmics
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