>and that is when you will make mistakes. While some trades using this method may not work out, the idea that he must make mistakes simply because he is riskin

>and that is when you will make mistakes. While some trades using this method may not work out, the idea that he must make mistakes simply because he is risking larger amounts is not at all a given. Some people have no sensitivity to such things. I know a couple of advantage gamblers that sometimes play $10,000+/hand on blackjack, and it might as well be $5 to them - not because they are super wealthy, but because they know they have an advantage, and understand that the math will work out over the long term. Whether they win or lose on a given hand, or wind up winning or losing on a given day, is meaningless to them and they rarely get emotional about it. The same certainly applies to many stock traders.