What is your winning formula?

[Yen N Yik]

So, you guys are saying that I should start noticing the ratings of the player after a match? Those always with 8 or 9 rating are players with good performance and should be retained in a team?

But if you buy a new player, how many matches do you give him before you determine that he does perform or not?
I got some player after playing 10 matches, got 8 matches with 6 rating and 2 matches with 8 rating. Is that a good player or not? How bout those who every match got 7 rating only?
How do you identify a player that can perform before you buy them?