What other people make or don't make is irrelevant to what I or anyone else makes. If you don't want to put together a trading plan, why not do something more useful with your money than throw it away on trading, like give it to the homeless?
Given that the vast majority of traders lose, a "realistic target" is a negative number.
Agree. You should at least target 15% ROI average in a year scale, so that even if some months you will fail to reach this point, overall you will have consistent result.