Yeah, and like said above as well, the FOMO feeling that comes with emotional trading. It's amazing how easy we can fall victim to that feeling when we are trading. I've seen myself do it so many times. Even if you think you won't do it, you'll find yourself looking at a chart with wide eyes and wanting to jump in. Just stop and check yourself before every execution. Have a checklist of rules. Don't break your rules.

That also goes for stop losses and profit targets. Know how much loss you can tolerate, and how long you can handle being in that trade. Sometimes the trade is ok to wait in, if there's clear indication on the longer term charts that it will be moving in the direction that you anticipate. Sometimes patience is critical.