Also, people should watch the Difficulty, not B.SELL - if you know where the Difficulty is going, then you know where SELL is going as well.
Who knows where difficulty is going? And why worry about it anyhow? We are trading your fantasy stocks after all. There are advantages in your game not applicable to playing the bitcoin market or the miner market.
One has to pay attention to B.SELL as this is part of your game and we are playing it.