I 'm disappointed most sites do not give performance data.That would be a nice little program live up to date rating..
Some are hyping -the unscrupulous ones- but what most of them are saying to us is "we are just trying to help" and this is also what the sports journalists always say.
So I came to the conclusion it has to be done that way, in an effort to create "the world's best ratings".
If it can be done, you are of course welcome to suggest your own formulas and have them tested.
I have the material to make calibrations (not the big OPAP excel file - other), but there is also a catch 22.
There are some big websites out there. Suppose Bruce Millington comes along and says "ok guys, I 'll give you a hand". What next ?
We have the post backing us but everything becomes public domain. The bookies copy and we are back to square one. That's the catch 22.