Most likely this is a secret, but still Ill ask. Are there any setups for automatic dice to stay in a small minus, but wind up the volume for the competition? But most likely whoever uses this just will not tell me

No, there's no secret. It's called a strategy which they come up at the very last minute of the contest.
It's about the bankroll that you have and most that has bigger bankrolls has higher chance of winning not just gambing alone but also in the contest.