Hi Ya Mattio.
Logic.

a/Favs Win more race 1 than any other.

b/The best Form Figures are X21 X 31 x141 151 161

To realize this you need access to a data base that holds 100,s of thousands of races.

i.e
Warren Blocks (of Wizard online)

The other thing thats important is to stop listening to crackpots.
(There is a ignore button on this site and how refreshing that is)

Hope that answers your question.When I was starting out I Questioned things too.
Luckily for me I went to good sources.Warren Block ,Gary Robinson,Malcolm Knowles etc etc.
These people and many others were only too pleased to help when I was in my Learning curve and even today when I,m unsure of something I double check with the best in the business.

Cheers
darky