Guideline 47. When there is a trading range, buy low sell high
When there is a trading range, buy low means that if the market is near the bottom of the range and you are short, you can buy back your short for a profit, and if there is a strong buy signal, you can buy to initiate a long. Likewise, when the market is toward the top of the range, you sell high. This selling can be to take your profit on your long, or, if there is a good short setup, you can sell to initiate a short position.