What does it take for a promotion?

[Thrutchy]

I did searches on promotion, streak, and some other keywords, then read parts of those threads. I saw some describing 4 game streaks and winning most games. This is what i found: skill rating is hidden, the rating system is secret, winning is good (especially against higher ranked players), losing is bad (especially against lower ranked players), and being matched up with the next tier means you might be nearing promotion.

I'm wonder if there is another component. Maybe I haven't played enough games yet? It seems silly that 22 wins vs 1 loss isn't enough. Not knowing how this works is frustrating.