# 小蚁的首单资金是如何计算的？

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## 小蚁的首单资金是如何计算的？

4月 ago[AntBot](https://www.antrade.io/guide/docs/cn/author/antbot/)1 minute

小蚁中的仓位管理方法，是以ATR指标为核心的。

**ATR是什么，如何计算获得？**

均幅指标(ATR)是取一定时间周期内的股价波动幅度的移动平均值。\
ATR计算公式如下：

**1、真实波幅（TR）：** TR = MAX（∣最高价-最低价∣，∣最高价-昨收∣，∣昨收-最低价∣）

**2、真实波幅均值（ATR）：** ATR = TR的N日简单移动平均

**以ATR制定头寸规模**

一般认为，交易品种的平均波动幅度ATR越大，其风险也越大。因此，波动越大的品种，头寸配比应该越小。

**首单资金 = M**\***总资金的1%/ATR**

前面公式中的变量M根据策略类型而定。

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