If you're looking for a way to reverse the data points of a signal (i.e. have it to start from the last point and end with the first one), use the Getdata function in TSCalculator with the following syntax:
getdata(2,(#Attributes.NumPoints#-$PointNumber$)+1,true)
This will reverse channel 2.
Note that the getdata() function allows all sorts of recursive operations on Time Series
More details in Help Doc: see in GlyphRefGuide, TimeSeriesCalculator
Fred Kihm - nCode