To be a sucessful trader

To be a successful trader "technical analysis" is just part of the story. You need a combination of all these:

1. Knowledge of trading techniques (whether based on tech analysis or fundamental analysis and preferably a little bit of both)
2. Money Management
3. Risk Management
4. Psychology of Trade
5. Discipline

The last one is probably the most important one.

It's almost impossible to have a stable income via trading forex but overally a trader can make much more than somebody who works from 9 to 5. Your income depends on several factors such as your account balance, your risk level, the trading system that you use, and many others.