交易者沉迷于各种交易方式中：长线交易，日内交易，剥头皮，振荡交易等等。长线交易通常持续很多天，而剩下的则是通过几分钟到几个小时的短线交易来获利。为了取得最优交易结果，交易者通常依赖于各种技术指标来预测价格走势。你将从本文中发现波段交易者是如何利用布林通道以及平均趋向指标来实现盈利的。
波段交易是投资者寻求快速盈利的一种。它与日交易类似，只是交易者不需要长期持仓。它可以是一个小时，一日或者是几日。如果市场条件事宜，波段交易者可以在几个小时内完成一笔交易。因此，为了充分利用价格走势，波段交易者需要知道那些可以为他带来预期盈利的指标。布林通道以及ADX（平均趋向指标）将会很好的帮助波段交易者利用趋势振荡。下面，让我们详细地了解它们。
布林通道：由于能够显示价格可能的反转点，布林通道是波段交易者众所周知的一个技术指标。它由三条曲线组成，这三天曲线是根据移动平均线以及标准方差演变而来。中线是某一时间段的价格移动平均线，上下通道线则是中线的标准方差。通常，中线是20日MA，上下通道线是中线的2倍标准方差。
使用方法：当价格突破上通道线时，便被认为是“超买”，表明价格清算以及获利平仓。相反地，价格下穿下通道线则表明“超卖”，说明仓位亏损。如果价格从下通道线上升，那么中线将会是第一个阻力位，此时如果交易量持续增加的话，那么价格继续上升并接近上通道线；价格从上通道下降时，那么中线将会是第一个支撑位，如果价格跌破支撑位并继续下降，那么下通道线将会是下一个需要留意的支撑位。
ADX（平均趋向指标）：布林通道显示的是价格有可能的转折点，而ADX指标则可以判断出趋势的是否强劲。ADX指标是DX（定向指标）的N周期的指数移动平均数。定向指标由2条指标组成，即+DI正趋向指标和-DI负趋向指标。+DI计算上升力量的强度，-DI计算下降力量的强度。它们都绘制在ADX图表中，范围在0~100之间。指标的标准周期是14.
使用方法：当ADX指标大于40时，说明当前价格走势强劲；ADX小于20说明趋势微弱。换句话说，只要ADX指标线高于40且呈上升趋势，就说明当前趋势将持续（熊市或牛市）；如果ADX低于40且方向向下，则表明价格将可能反转。同样地，如果ADX趋势线位于20以下并呈上升趋势，说明当前价格走势的动能正在增加。
在下面的文章中，你将发现布林通道与ADX指标将如何有助于交易。
策略：如果价格试探布林线的上通道线或下通道线，就有可能反转，反转强度可以根据ADX趋势以及水平位确定。
示例1：如果价格正在布林上通道线处探顶，观察ADX是否低于40且方向向下，如果是，则说明卖方压力，目标位可以是布林中线或者下通道线。
四小时图：上面欧美的四小时图展示了如何使用布林线以及ADX交易。上图中我们能看到，价格收于布林上通道线上方1.3265处，说明价格处于超买区，多头获利平仓。下面的ADX指标窗口中，ADX方向向下也说明当前的价格上升趋势即将反转。价格下探布林下通道线1.3030处，说明价格有可能回调。因此，空头应该在该处平仓获利。
1小时图：价格下穿布林通道的下通道线、ADX也向下表明此次清算过后趋势很有可能发生反转。因此，在下通道线处买入后绘出一条趋势线，我们应该在价格上探上通道线之前持续持仓。也就是在1.3390价位买入，在1.3430卖出，我们可以盈利40点。示例2：如果价格突破布林线下通道线（上通道线），ADX位于20下方且方向向上，说明价格将会上升（下降）直到布林上通道线（下通道线）或者ADX向下反转。
四小时图：上图显示欧美突破正常交易区间后迅速上升至1.2730水平，并得到ADX支撑（大于20且方向向上）。也许你会说，价格上探布林上通道线很多次，这足以说明卖方压力。但你需要注意的是，价格没有一次收于通道线上方，仅仅是靠近上通道线不足以说明市场处于超买阶段。
1小时图：价格处于区间一段时间之后突然产生卖方压力，此时ADX指标大于20且处于上升趋势中，表明价格的卖方压力将会持续。在该位置做空并以价格收于布林通道线下方为目标。这个例子中，1.3030做空，1.2970平仓，将会获利60点。
等级: 三星级（最高为五星级）
反馈：从振荡区间交易者来看，该指标很重要。但是它的局限是没有止损：当仓位与价格走势违背时，该策略不会发出平仓提示。因此，需要格外的小心。当价格走势逆转时，你可以使用别的指标来提供平仓信号。
Swing trading with the help of Bollinger band and ADX
Traders indulge into various kind of trading: positional trading, intraday-day trading, scalping, swing trading, etc. Where positional trading is of longer duration, the rest of them are of shorter duration ranging from a day to just couple of minutes to take the required benefits. In order to get the optimum gains they depend on various technical indicators which help them to forecast movement on the basis of given price chart. In the following article you’ll find how a trader can benefit from two basic indicators namely, Bollinger band and ADX in order to get required benefits from swing trading.
Swing trading is a type of trading wherein investors look for quick gains. It is very similar to day trading wherein investors don’t hold their positions with long term scenario. It may be for an hour, a day or couple of days that a swing trader is looking for. Given the opportunities provided by market movement, swing traders enter and exit the market in the same day or may be couple of hours. Hence, in order to capitalize the market moves we should know such indicators which help gain the required return as soon as possible. Bollinger band and ADX (Average Directional Movement Index) are two such technical indicators which help benefit from price swings. Let’s understand them in detail.
Bollinger band: Bollinger band is a widely known technical indicator for swing trading as it indicates the probable turnaround in prices. It consists of three curves which are drawn with the help of moving average and standard deviations. The middle band is a moving average of a definite period, where as the upper and lower bands are standard deviations of the middle line. Generally, Middle band is made up of 20 day moving average while upper and lower band are at 2 standard deviations of the middle band.
Usage: When an underlying moves outside the upper Bollinger band, it is considered "overbought" indicating probable profit booking and price liquidation. Conversely, when an underlying trades below the lower Bollinger band, it is considered “oversold” and indicates prices to cover the losses. In case the underlying quote has moved up from the lower band, then middle band would be the first resistance while sustained trading above middle band would lead the quote towards upper band. In case of quote moving down from the upper band the first support would be middle band, if it fails to sustain that support; lower band would be the next level to watch.
ADX (Average Directional Movement Index or Average Directional Index): While Bollinger band indicates a probable turn around, ADX indicates the strength of the existing price move. ADX is exponential moving average of Directional Index (DX) for a specified period of time. Directional Index is made up of two indicators, namely, positive directional indicator (+DI) and negative directional indicator (–DI). The +DI calculates the strength of upward move while the –DI calculates the strength of downward move. Both of them are being plotted with the ADX in the indicator window between a bounded range of zero and 100. The standard time period used in this indicator is 14 periods. Usage: When the ADX is above 40 level, prevailing trend is considered to be a strong one while in case of ADX trading below 20 level, it indicates a weaker trend. In other words, as far as the ADX line trades above 40 level with upward trend, it indicates continuance of the prevailing trend (Be it Bullish or Bearish) while a down ward turn below 40 level would indicate a probable change in trend. In a same way, if the ADX line is trading below 20 level and showing the sign of increase, the prevailing trend is expected to gain momentum.
In the following article you’ll learn how Bollinger Band and ADX (Average Directional Movement Index) would help in swing trading.
Strategy: If the underlying quote is testing upper or lower band of Bollinger, it is expected to reverse, the strength of reversal can be known with the present level and trend of ADX.
Example 1: If the quote is trading above upper band of Bollinger, look for the ADX if it is ranging downward towards below 40 level then selling pressure is expected with the targets of middle band and then lower band of Bollinger.
Four Hour Chart: Above mentioned four hourly chart of EURUSD describes how to trade with the help of Bollinger band and ADX. As we can see, the quote crossed the upper band of Bollinger closing above 1.3265, indicating overbought scenario and expectation of profit booking. At the lower panel, a dip below 40 level in ADX also signaled change in the prevailing buying. The trend reversal was supported with the descending trend line on ADX. The quote tested the lower band of Bollinger near 1.3030 indicating a probable turn around in prices. Hence, an investor should book full profits at 1.3030.
Hourly Chart: Above mentioned hourly chart of EURUSD gives another example of how to trade with the help of ADX and Bollinger band. The quotes traded below the lower band of Bollinger and ADX was also trending downwards indicating a probable trend reversal from the existing liquidation. Hence, by buying at the lower band of Bollinger and drawing a trend line, we should hold our position until the quote tests upper band of Bollinger. As per above mentioned strategy, by buying near 1.3390 and liquidating positions near 1.3430, we can make profits of 40 bps. Example 2: If the prices give breakout from the lower area of Bollinger (or upper area) with ADX ranging upwards from below 20 level, it is expected that prices will trade higher (lower) until the prices gave close above upper band of Bollinger (or below lower band of Bollinger) or the downtick in the ADX, whichever comes first.
Four Hour Chart: Looking from above mentioned four hourly chart of EURUSD, it can be observed that sudden spurt in EURUSD quote breaking the normal range and forcing the quote to trade above 1.2730 level was well supported by ascending ADX above 20 level. One wouldargue that the quote have touched upper band of Bollinger many a time which should indicateselling, But it should be bear in mind that none of the time it has given a closing above Upper Bollinger Band, merely trading near the upper band would not indicate an overbought market.
Hourly Chart: Above mentioned hourly chart of EURUSD gives another example of how to trade with the help of ADX and Bollinger band. As the prices were trading in range and sudden spurt of selling initiated, one should look for the ADX which is reversing from 20 level indicating the selling pressure has a strength and would continue. Taking sell position at that level one should have the target of a close below lower Bollinger band. In this example, 60 bps (the difference between 1.3030 and 1.2970) were the gains generated with the help of this strategy.
Rating: 3 out of 5 stars
Feedback: The strategy seems important from the swing trader’s point of view but the point of limitation is stop loss orders. The strategy is mute regarding the point of exit from the existing position in case of adverse price movement. Hence, in order to take due care, it is always expected to use certain other indicators which provide stop loss point in case of adverse price movement.
文章翻译由兄弟财经提供
本文来源：http://www.fxstreet.com/education/fundamental/swing-trading-help-of-bollinger-band-adx/2013/05/07/