If you wait for the market to tell you that your trade is wrong, you will always pay a higher price. Your stop-loss position may not be the point where you can actually close the position, for example, you set a stop-loss at $6.42, but you might only be able to close at $6.45. Let the market tell you that your trade is correct before holding the position. In other words, trading is a "loser" game, not a "winner" game (Note: Trading is not an advantage game; if you haven't proven yourself to be a winner, you are a loser).