---
title: "轨道线 (Envelopes) - 趋势指标 - 指标 - 图表 - MetaTrader 5 的 Android 版 - MetaTrader 5 Android 帮助"
description: "轨道线技术指标由两条 移动平均线 组成，一条向上偏移而另一条向下偏移。波带边距偏移的最佳相对数字由行情波动率来确定选择: 后者越高，偏移越强烈。 轨道线定义了价格范围的上下边距。当价格抵达波带的上边缘时出现卖出信号; 当价格抵达下边缘出现买进信号... - 轨道线 (Envelopes) - 趋势指标 - 指标"
image: "https://www.metatrader5.com/i/logo_metatrader5.png"
url: "https://www.metatrader5.com/zh/mobile-trading/android/help/chart/indicators/trend_indicators/envelopes"
---

[MetaTrader 5 Android 帮助](https://www.metatrader5.com/zh/mobile-trading/android/help) → [图表](https://www.metatrader5.com/zh/mobile-trading/android/help/chart) → [指标](https://www.metatrader5.com/zh/mobile-trading/android/help/chart/indicators) → [趋势指标](https://www.metatrader5.com/zh/mobile-trading/android/help/chart/indicators/trend_indicators) → 轨道线 (Envelopes)

# 轨道线 (Envelopes)

轨道线技术指标由两条 [移动平均线](https://www.metatrader5.com/zh/mobile-trading/android/help/chart/indicators/trend_indicators/moving_average)组成，一条向上偏移而另一条向下偏移。波带边距偏移的最佳相对数字由行情波动率来确定选择: 后者越高，偏移越强烈。

轨道线定义了价格范围的上下边距。当价格抵达波带的上边缘时出现卖出信号; 当价格抵达下边缘出现买进信号。

轨道线背后的逻辑就是过分兴奋的买家和卖家将价格推到了极值 (即，上边缘和下边缘)，在这一点价格通常会移到更现实的级别来稳定。这就类似于[布林带 (BB)](https://www.metatrader5.com/zh/mobile-trading/android/help/chart/indicators/trend_indicators/bollinger_bands)的阐述。

![轨道线 (Envelopes)](https://www.metatrader5.com/i/help/android/en/envelopes.png)

## 计算公式:

```
UPPER BAND = SMA (CLOSE, N) * [1 + K / 1000]
```

```
LOWER BAND = SMA (CLOSE, N) * [1 - K / 1000]
```

其中:

UPPER BAND ― 指标的上边界线;
LOWER BAND ― 指标的下边界线;
SMA ― [简单移动均线](https://www.metatrader5.com/zh/mobile-trading/android/help/chart/indicators/trend_indicators/moving_average#sma);
CLOSE ― 收盘价;
N ― 均化周期;
K / 1000 ― 距平均值 (以基点测量) 的偏移值。

## In this section

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

```json
{"@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ {"@type": "ListItem", "position": 1, "item": {"@id": "https://www.metatrader5.com/zh/mobile-trading/android/help", "name": "MetaTrader 5 Android 帮助"}}, {"@type": "ListItem", "position": 2, "item": {"@id": "https://www.metatrader5.com/zh/mobile-trading/android/help/chart", "name": "图表"}}, {"@type": "ListItem", "position": 3, "item": {"@id": "https://www.metatrader5.com/zh/mobile-trading/android/help/chart/indicators", "name": "指标"}}, {"@type": "ListItem", "position": 4, "item": {"@id": "https://www.metatrader5.com/zh/mobile-trading/android/help/chart/indicators/trend_indicators", "name": "趋势指标"}}, {"@type": "ListItem", "position": 5, "item": {"@id": "https://www.metatrader5.com/zh/mobile-trading/android/help/chart/indicators/trend_indicators/envelopes", "name": "轨道线 (Envelopes)"}} ]}
{ "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{ "@type": "Question", "name": "MetaTrader 5: 轨道线 (Envelopes)", "acceptedAnswer": { "@type": "Answer", "text": "轨道线技术指标由两条 移动平均线 组成，一条向上偏移而另一条向下偏移。波带边距偏移的最佳相对数字由行情波动率来确定选择: 后者越高，偏移越强烈。 轨道线定义了价格范围的上下边距。当价格抵达波带的上边缘时出现卖出信号; 当价格抵达下边缘出现买进信号..." } }] }
```