Piece of advice, dont worry about trading metrics such as what you are asking UNTIL you have already shown consistent profitability on your own. Then, once you do that, its all about refining your trading to increase total points gained.
Its like asking what is a good amount of points per game to average in basketball before you've ever even played the game. Seems silly right?
Also, it does no good to hear what other people make who know how to trade because its highly likely you will then shoot to make that amount of points rather than actually learning to trade the way that best suits your personality. Remember, everyone is different.