1. Unrealistic profit expectation
Unrealistic profit expectation is the common problem for novice traders as they are speculating huge profits without financial calculation with proper tested strategy.
This is important for newbie traders as I know most will still be having this issue and even older traders. This cause of this is greed. If we become greedy, there is a big trap waiting at the front that we can be trapped. So is better to set realistic profit goal at every trade order we make.