Oh, you may find that this post comes in very handy: http://www.thetradersden.org/forums/...0&postcount=37

I found that I didn't need to use this "scientific" method of doing speed-correction because I came within about +/-0.3% of what his method indicated the correct speed would have been, which probably would have been in the statistically allowable deviation range, but if you're worried at all about the speed, try this method to double check what your ears tell you.