There's nothing to learn from trading; learning techniques is nonsense.

The core idea is to hold on a bit longer when you're right, and to run away immediately when you're wrong, never holding onto a losing position or increasing your stake. As long as you can make more profits than the losses from stop-losses, the overall expectation is positive, and you'll be profitable.

The principle is this principle, but in practice, you will find it very difficult. Most people quickly cash out when they make a profit, and when they incur losses, they stubbornly hold on, hoping to recover. Once they recover, they immediately run away.