In general, it is a good idea to use stop-loss orders

But you shouldn't use them blatantly and thoughtlessly. To put it differently, you shouldn't force yourself to use them just because it is the right thing to do. They should come off sort of naturally and I'm not kidding. When you force yourself to do something even if it is technically a right thing to do, you will break sooner or later making a lot of foolish mistakes in the process. But when you use them with a deep feeling of doing the right thing without inner resistance, you won't hesitate to push it through when the time comes