Arena ranking: after a victorious Arena fight you will receive higher Arena rank. If your attack is not successful, you will not lose your place. But if you are defeated in defense you can lose several positions at a time.
When you achieve a certain rank on the Arena for the first time you will receive gems as a reward. If you move for several positions at a time (e.g. from place 100 to place 80) your reward considers all interim positions.
Every day you can receive 10 arena coins for each successful defense up to 5 times daily.
Arena reward: You will receive Emeralds, Gold and Arena Coins as a reward for your Arena rank every day. The higher your rank is, the bigger the reward will be.
You will find additional information in the Arena interface - hit the Rules button!
NOTE: To access the reward you need to fight at least 1 battle on that day before awarding.