---
title: "标准偏差 (Standard Deviation) - 趋势指标 - 指标 - 图表 - MetaTrader 5 的 iPhone 版 - MetaTrader 5 iPhone/iPad 帮助"
description: "标准偏差是行情波动率衡量数值。指标描述价格范围相对于 移动平均线 变幻。所以，如果指标值较高，则行情处于波动，柱线价格相对于移动平均线而言相当分散。如果指标值较低，行情处于低波动，柱线价格相对于移动平均线而言靠拢。... - 标准偏差 (Standard Deviation) - 趋势指标 - 指标"
image: "https://www.metatrader5.com/i/logo_metatrader5.png"
url: "https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/standard_deviation"
---

[MetaTrader 5 iPhone/iPad 帮助](https://www.metatrader5.com/zh/mobile-trading/iphone/help) → [图表](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart) → [指标](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators) → [趋势指标](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators) → 标准偏差 (Standard Deviation)

# 标准偏差 (Standard Deviation)

标准偏差是行情波动率衡量数值。指标描述价格范围相对于 [移动平均线](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/moving_average) 变幻。所以，如果指标值较高，则行情处于波动，柱线价格相对于移动平均线而言相当分散。如果指标值较低，行情处于低波动，柱线价格相对于移动平均线而言靠拢。

正常情况下，该指标作为其它指标的组成部分使用。对于 [布林带 (Bollinger Bands®)](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/bollinger_bands) 的计算,

该品种的标准偏差值被加入其 [移动均线](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/moving_average)。

市场行为表现为交易活跃与疲软互现。所以，该指标很容易解释:

- 如果其值太低，即，市场毫无生气，所以期待不久就会出现暴涨;
- 否则，如果其值极高，则意味着活力不久就会降温。

![标准偏差 (Standard Deviation)](https://www.metatrader5.com/i/help/iphone/en/standard_deviation.png)

## 计算公式:

```
StdDev (i) = SQRT (AMOUNT (j = i - N, i) / N)
```

```
AMOUNT (j = i - N, i) = SUM ((ApPRICE (j) - MA (ApPRICE , N, i)) ^ 2)
```

其中:

StdDev (i) ― 当前柱线的标准偏差;
SQRT ― 平方根;
AMOUNT(j = i - N, i) ― 从 j = i - N 至 i 的平方和;
N ― 平滑周期;
ApPRICE (j) ― 第 j 根柱线应用的价格;
MA (ApPRICE , N, i) ― 当前柱线上的 N 周期移动均值;
ApPRICE (i) ― 当前柱线的应用价格。

## In this section

- [平均定向运动指数 (Average Directional Movement Index)](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/average_directional_movement_index)
- [布林带 (Bollinger Bands®)](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/bollinger_bands)
- [轨道线 (Envelopes)](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/envelopes)
- [一目平衡表 (Ichimoku Kinko Hyo)](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/ichimoku_kinko_hyo)
- [移动均线 (Moving Average)](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/moving_average)
- [抛物线转向 (Parabolic SAR)](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/parabolic_sar)
- 标准偏差 (Standard Deviation)
- [ZigZag](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/zigzag)

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