The matchmaking algorithm is the unsung hero that determines exactly who you will face every time you press the 'Battle' button.

Many players believe that matchmaking is intentionally rigged against them, constantly forcing them to fight 'hard counters' after a win streak.
How You Are Ranked
The algorithm's primary goal is to match you against someone with the exact same—or very similar—trophy count.

When you go on a massive winning streak, your trophy count inflates, and the algorithm begins matching you against significantly better players.
If you are hovering around 50%, you are in the correct arena for your skill level.Queue times increase at the top of the ladder.If you drop trophies, the algorithm matches you against easier opponents. Level-Based Matchmaking
The standard Elo system works perfectly for chess because all pieces are equal, but tower rush games feature upgradeable cards.

To combat this, developers have implemented secondary checks that look at the player's King Tower level.
System PrioritySignificanceCurrent RankThe system will always prioritize finding an opponent within a 50-trophy rangeAccount StrengthThe system tries to match levels, but will abandon this check if the queue takes longer than 10 seconds True Fairness
This is why all true esports tournaments and competitive challenges utilize the 'Tournament Standard' ruleset.

When levels are equalized, the matchmaking system shines, ensuring that the better player almost always wins.