I agree. Discipline is the king here, if you have a big win or a big defeat, you should stop, consider the odds, and only then make your next move.
Definitely, if anyone masters this, then he/she can make better calls in gambling. Discipline is the key factor for everyone’s life in every profession. If you lack discipline and let your ego control you, then definitely you will make losses. You need to set small targets and need to achieve them daily. Double is a good amount to take a temporary pause and reward yourself with some luxury. If you take stress or greed and gamble, then definitely you will make losses.