That's ture, but that's why you would want to use VERY tight stops. No, 10% lee way garbage. And you wouldn't want to use volataile stocks necessarily. If you can make a lot of money in a few minutes, you could also lose it. It is a totally different discipline from day trading. Nice little value stocks that you could safely scalp .5-1% a week off of as they slowly meander back and forth.
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