Deadly Mistakes Traders Make

Trading without a plan.
Having unrealistic expectations.
Over-trading your account, in terms of trading frequency or trading size.
Not defining your trades you are going to take.
Not defining the risks. Small loss turns into a big loss.
Not using stops.
Wanting to be right instead of making money.
Listening to others. Blind leads a blind.
Getting an opinion and trading it.
Using too many oscillators or indicators to make decisions.
Not paying attention to previous market actions.
Over spending on computer and software. Not keeping it simple.
Trading arround the clock.
Fear of losing money.
Assuming successful paper trading will lead to successful live trading.
Choosing the wrong methodoloty.