Behind the colorful graphics and intense gameplay of every successful arena battler lies a complex, invisible mathematical engine.

While this conspiracy theory is widespread, the reality is much more mundane and focused entirely on mathematical fairness.
How You Are Ranked
The algorithm's primary goal is to match you against someone with the exact same—or very similar—trophy count.

This is why winning streaks inevitably end in a 'wall' of difficult matches; the system is functioning exactly as intended.
Do not expect to win every game.Because there are fewer Grandmasters, the algorithm struggles to find perfect matches.You will eventually stabilize. The Free-to-Play Dilemma
The standard Elo system works perfectly for chess because all pieces are equal, but tower rush games feature upgradeable cards.

The system will try its best to match you with someone who has the same trophies AND a similar tower level.
Matchmaking FactorSignificanceCurrent RankAbsolute Highest PriorityKing Level / Card LevelsSecondary Priority True Fairness
By artificially capping all card levels to a specific number, the algorithm can rely purely on the Elo rating.

Trust the math, ignore the conspiracy theories, and focus on improving your own gameplay.