To explain, basically a player's breakeven is the score they must make in order to stay at their current price. If the player scores below, their price plummets, if they score more, their price tag will rise. Think of it this way...it's practically the share market game for AFL fans!
AFL Fantasy coaches will watch these breakevens in the hope of trading in a player when their breakeven is low (or sometimes in negatives) which is ideal when you need to trade a player down (downgrade). Alternatively, when a player, or 'Cashcow' as they are referred to as, has reached their peak in terms of scoring average and breakeven, then they are ready to cull. You need to also keep an eye on those premium players who perhaps have put in a stinker of a game or been injured, so their price will start to plummet and you can pick them up at a bargain price!