Range expansion periods are just the opposite of the range contraction periods.Range expansion periods can be measured by requiring that the 10 bar ATR be some amount greater than the 50 period ATR.

• 通过比较短期ATR和长期ATR可以非常容易的鉴别出价格平静的横盘整理区间，比如当10期ATR小于等于0.；75倍50期ATR时，就表明近期市场不寻常的平静。