It's joyous to make gains in trading. The problem is how does one control his mind when there is a huge lose
It's up to us. We have different types of whatever we do once we are at a huge loss. During a huge loss, I take a break from trading for about 2-3 days depends on how much amount we are talking about here. Don't control your mind during huge loss but rather accept the pain. It really happened in trading and what we need to do is to be used on it.
Acceptance is better, you can heal things up and start a new, trading is a mind game always remember that your loss is someones gain and vice versa, if you suffer one accept it then move on but before doing that best to analyze and assess, it helps a lot when you observed what you have done wrong or what influenced the market that went wrong according to your assessments.
After you realize, plan and give yourself enough time to research, no need to rush and try to recover right away. You are not playing like a gambler, but you are a trader.
Learn to adjust. You are the only one who can make things right. Remember, you are the captain of your own ship.