Most traders fail because: 1 - they are GREEDY. 2 - they are scared of losing.
To get on the right side of the ledger as a trader one MUST learn to control the emotions of greed and fear of loss.
Greed causes traders to over-leverage, over-trade and miss profit opportunities. Fear of loss causes traders to stay in bad trades too long (amongst other things).
Learn to control these two emotions and you will become part of the 5% club.