---
title: "布林带 (Bollinger Bands®) - 趋势指标 - 指标 - 图表 - MetaTrader 5 的 iPhone 版 - MetaTrader 5 iPhone/iPad 帮助"
description: "布林带 (BB) 类似于 轨道线 。唯一的区别在于轨道线的带边线与 移动平均线 的距离 (%... - 布林带 (Bollinger Bands®) - 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/bollinger_bands"
---

[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) → 布林带 (Bollinger Bands®)

# 布林带 (Bollinger Bands®)

布林带 (BB) 类似于[轨道线](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/envelopes)。唯一的区别在于轨道线的带边线与[移动平均线](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/moving_average)的距离 (%) 是固定的，而布林带则是采用某个距其的标准偏差数字来绘制。标准偏差是一种波动性测量值，因此布林带调整自身来适应行情状况。当行情不稳定时，布林带就会放宽，而在稳定期就会收缩。

布林带通常绘制在价格图表上，但也能添加到指标图表。就像[轨道线指标](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/envelopes)的情况，布林带的阐释基于价格趋于保持在波带的顶部界线和底部界线之间的事实。布林带指标的一个显著特征就是随着价格的波动，其宽度可变。在重大价格变化期间 (即，剧烈波动时) 带宽扩大为价格进入留有很多空间。在平静期，或低波动性期间，带宽收缩保持价格在它们的极限之内。

以下特征是布林带特有的:

1. 由于波动性降低带宽收缩，易于发生价格突变;
2. 如果价格突破上边带，预期当前的趋势会延续;
3. 如果尖顶和深坑超出带宽之后又缩回带宽之内，也许趋势会逆转;
4. 若价格走势始自一条边带线，那么通常会到达相对一侧。

最后的观察对于预测价格指导是有用的。

![布林带 (Bollinger Bands®)](https://www.metatrader5.com/i/help/iphone/en/bollinger_bands.png)

## 计算

布林带由三条线形成。中间线 (ML) 就是一条普通的[移动平均线](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/moving_average)。

```
ML = SUM (CLOSE, N) / N = SMA (CLOSE, N)
```

顶线 (TL) 是中线以相同标准偏差数向上移动。

```
TL = ML + (D * StdDev)
```

底线 (BL) 是中线以相同标准偏差数向下移动。

```
BL = ML - (D * StdDev)
```

其中:

SUM (..., N) ― N 周期的总和;
CLOSE ― 收盘价;
N ― 计算所用的周期数;
SMA ― [简单移动均线](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/moving_average#sma);
SQRT ― 平方差;
StdDev ― 标准偏差:

```
StdDev = SQRT (SUM ((CLOSE �D SMA (CLOSE, N))^2, N)/N)
```

推荐使用 20-周期简单移动平均线作为中线，并距此以两个标准偏差绘制顶边线和底边线。此外，小于 10 周期的移动平均线效果不佳。

## 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®)
- [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)](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/standard_deviation)
- [ZigZag](https://www.metatrader5.com/zh/mobile-trading/iphone/help/chart/indicators/trend_indicators/zigzag)

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