Intellegence Important: Yes
Will it Make me Money: Not by itself, it won't
Here's what you need:
1. Enough intelligence to generate trading ideas and strategies (remember, good strategies don't have to be complex)
2. Execution skills to carry out your plans. This includes not hesitating when your strategy tells you to take action.
3. Discipline to manage your risk, discipline to control your emotions, discipline to keep your ego in check.