平均真实范围指标（ATR）用于衡量市场波动率。 这个外汇指标是由Welles Wilder在他的书“技术交易系统中的新概念”中描述的。 自那以后，ATR指标已被用作其他交易系统的一部分。
在大量抛售后价格急剧下跌之后，平均真实指标通常在底部达到峰值。 指标的低读数对应于在峰值和巩固期看到的连续水平移动时段。 ATR可以像其他波动性指标一样解释。 要根据ATR做出准确的预测，应该坚持以下原则：读数越高，趋势反转的可能性越高; 读数越低，趋势势头越弱。
真实范围是这三个变量中最大的值：
- 当前高点和低点之间的差异;
- 前一收盘价格与当前最高价格之间的差异;
- 前一收盘价格与当前最低价格之间的差异。
简单的说什么是ATR？ 它是真实范围内读数的移动平均值。
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