Board Thread:Card Unit Builds/@comment-2.136.30.143-20141115210954

Hello everyone! I'm new to the game. I've been playing for about 3 days, I'm lvl 19, got castle lv. 4, alliance hall, max lvl cards, full BP etc... The problem is that when I try to enter alliance battle it says that I don't meet the requirements to join it yet.. I've searched everywhere and still got no clue, which are those requirements? Thanks in advance. 