Stop loss is a trading technique that may help you prevent large losses; you can use it every time you trade, and it's a highly safe and helpful instrument for protecting your money from market volatility. In reality, if you want to, you can study this type of things on YouTube. Because, in my opinion, watching videos is more informative than other methods of learning because you can apply it quickly as if you were in a real training, especially if it's a step-by-step tutorial. It's a very basic way if you're really interested in having such knowledge when it comes to trading.