It depends on how greedy we are for what we want, if we have very little capital and we want great results then it is not possible in forex, it only does it very risky to our equity when the market is not on our side in minutes and even seconds the money we invest will disappear and there is actually no limit to how much a trader can make in a day on forex but depends on the trader. I have earned $ 4 today so far but I can get up to $ 10 if I leave the trade to continue. That is the difference between me (new trader) and professional trader in forex. They get different amounts of the same type of trade.