[Ted Craven]

Here you go:

"CSR– Composite Speed Rating. A weighting of the RDSS Adjusted Speed Rating from the last 4 usable lines, regardless of distance, surface, race conditions or finish. The weighting is as follows: 100% of the last line SR + 62% of the average of the last 2 lines SR + 38% of the average of the last 3 lines SR + 24% of the average of the last 4 lines SR. Thus the last line SR has a major weighting in the CSR, with the weighting declining for older lines. "

Also - " if you use CSR, and you judge that it is compromised by clearly troubled or excusable low Speed ratings in the last 4 lines (more affected by the last 2 lines), you can recompute the CSR by clicking on its value in the Horse Header screen. The LOWEST rating in the last 4 is removed and the remaining Top 4 are used in a recalculation. (There are better ways to accomplish this, and will be in future, AND if you do more than 1 horse in a race, previous recalculations are lost – but that said, if you use CSR for a measure of consistency, and Top 5 rankings matter, and it is a component in Rx – then feel free to touch up CSR by hand if you like)."

RDSS Documentation -

http://rdss2.com/V2.1-docs-pdf
http://paceandcap.com/forums/showthread.php?t=13336

Ted