This is often suggested but it can be hardly followed by most traders, and the reason is simple, if you want to obtain more profits with the same amount of effort, you will have to increase the capital you put at risk, and since very few people have the money to spare to trade the markets and be completely unaffected in the case they lost that money, it is easy to understand why when people lose some money, they get overemotional about and they cannot deal with the losses they got when trading the markets.