精华 供新手参考:布林线实战要点

mei168

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布林线是一种"路径类指标",由于兼具灵活和顺应趋势的特点,使它成为目前资本市场中被普遍使用的技术指标之一。布林线指标给出的是一个指数或股价波动的上轨和下轨的区间,同时通过一条中线来配合对趋势进行判断。虽然股价在"上轨"和"下轨"的波动带内变动,但这条波动带的宽窄却随着股价波动幅度的大小而变化。股价变动幅度加大时,波动带会变宽;股价横盘整理时,波动带保持不变或收窄。也就是说,布林线所给出的波动带的区间是随着股价的变化而不断进行相应调整的。
  在应用该指标时,重点在于波动带的变动和指数或股价对波动带的穿越。一般而言,当布林线的波动带呈水平方向移动时,可以被视为目前的趋势以横盘运行为主,属于"常态的范围"。在这种情况下,当股价向上穿越"上轨"时,将会形成短期的回档,可以看作是短线的卖出信号;股价向下穿越"下轨"时,将会形成短期的反弹,此时则为短线的买进时机。但股指或股价经过一段时间的横盘运行后,布林线的波动带区间有收窄迹象,即"上轨"和"下轨"相互靠拢时,则表示将要开始出现变盘。此时若股价连续穿越"上轨",表示股价将朝上涨方向运行;而当股价连续穿越"下轨",表示股价将朝下跌方向运行。
  实际上,布林线对于波段操作的指导性较强。它在常态的情况下有通过上下轨的区间指明压力支撑的功能,并在股价穿越该区域时指出是否处于超买超卖的状态。同时在趋势运行时,它的作用也较为明显。一方面,在股指或股价形成突破之前,投资者可以通过观察波动带是否有收窄迹象来提前作好准备。另一方面,在趋势将要结束时,投资者可以通过观察股价对波动带中线的穿越,并结合波动带的变动来提前把握阶段性操作机会。尤其是在暴涨或暴跌的末期,股价常常会冲出布林线的上轨或下轨。此时,若果断高抛逃顶或底吸进场,短线收益将十分可观。
  不过对于经历了波动带持久收缩后刚刚在形态上有突破的个股,在股价变动的初期应用布林线时要尽量避免短线操作。在上涨初期,由于在开始突破的前几个交易日内股价一般走势较强,在触及布林线的上轨后,常常是以横盘强势整理来消化技术上的压力,或改为贴近布林线上轨运行,而不出现回调,此时若在上轨附近卖出后,却不一定能够再有较好的价位回补,此时很容易错过中线收益的机会。在下跌趋势刚开始时亦然,股价短时间经历急速跌穿下轨后,可能改为缓跌或横盘修正,此时进场抢反弹却可能陷入被套的困境。不过上述两种情况下,布林线可与SAR停损指标配合使用,以达到取长补短,增加胜算的投资效果。
 
牛市赚钱,熊市赚股,在大势趋弱时正是铲底赚股的好时机。通常弱市中最擅长于铲底的技术指标是BOLL。
  许多书籍上只要一提及布林带的应用,就少不了这两句话:股价向上穿越支撑线为买入信号,股价向下穿越阻力线为卖出信号。果真如此吗?只要打开软件就会发现,按这种方法确定买入信号的话,在股指的整个下调过程中全是买点,这是非常不可靠的。布林带在弱市中应用要注意以下要点:
  1.不能将股价向上穿越支撑线作为买入信号,而是要将个股的最低价的连线穿越布林带下轨作为可以初步关注该股的信号。
  2.出现初选信号后,一般股价会有回抽动作,如果股价回抽不有效击穿下轨,而且布林带支撑线向上拐头。这时可以初步确认为买入信号。
  3.买入信号的最终确认主要是观察成交量是否能够温和放大。
  4.要注意布林带宽度是否已经处于收敛状态,这也是信号确认的一个重要因素。
 
布林线以其极高的参考价值成为一种国际广泛流行的实战技法,其实战指导较为直观,有效.而投资者一旦真正从趋势及概率意义上理解与认知这一有效的技术工具,则可进一步提升实战操作的战斗力。布林线日线参数多设为20天或25天,其中20天较为敏感,实战参考价值较大,在股市波动周期加长的今天,以布林中轨所代表20天均线可对强势股热门股2至4周以上的波段趋势及买卖点提供更强的实战指导。
  1.布林中轨经长期大幅下跌后转平,出现向上的拐点。且股价在中轨之上三天确认,往往回档低点是适量低吸的中短线极佳的买入点。
  2.一段时间的价量配合流畅且均衡,区间阳线累计换手高于阴线换手,且市场换手积极,相对前期温和放量,锁筹较好的温和换手0.8-1.2%以上,持续攻击性换手20个交易日以上的区间日均换手须保持1.5-2%以上。
  3.对于在布林中轨与上轨之间运作的强势股,不妨以回抽中轨作为低吸买点并以中轨作为重要的止赢止损线。
  4.配合K线有圆弧底,双底,头肩底,复合底形态的效果更佳。  
5.上破布林上轨三天或冲出上轨过多,市场无法连续放量或伴有主力盘口诱多行为,投资者必须注意放量放手,短线注意果断高抛了结。
 
结论:
1、股价从下方穿越BOLL中轨,是转强迹象,可密切关注。股价一旦从下穿越中轨,就是牛熊标志。当然不是唯一的法则,另外一个修正法则就是一定要站住牢牢地3天。
2、一切在BOLL中轨下方的股票,不需要用自己资金去关照。
。3、K线突破30日均线后,可加仓操作,如果BOLL、三十日线、宝塔线,三者同时条件成立,成功率较高。对于短线操作上结合BOLL、RSI、MDI指标综合运用,或许有所帮助。以上方法是思考的技术分析方法,可能不太成熟,边实践边运用。
同时也希望大家提供其更好的分折知识,让大家分享。多谢!!
 
One of the great joys of having invented an analytical technique such as Bollinger Bands is seeing what other people do with it. While there are many ways to use Bollinger Bands, following are a few rules that serve as a good beginning point.


Bollinger Bands provide a relative definition of high and low.


That relative definition can be used to compare price action and indicator action to arrive at rigorous buy and sell decisions.


Appropriate indicators can be derived from momentum, volume, sentiment, open interest, inter-market data, etc.


Volatility and trend have already been deployed in the construction of Bollinger Bands, so their use for confirmation of price action is not recommended.


The indicators used for confirmation should not be directly related to one another. Two indicators from the same category do not increase confirmation. Avoid colinearity.


Bollinger Bands can also be used to clarify pure price patterns such as M-type; tops and W-type bottoms, momentum shifts, etc.


Price can, and does, walk up the upper Bollinger Band and down the lower Bollinger Band.


Closes outside the Bollinger Bands can be continuation signals, not reversal signals--as is demonstrated by the use of Bollinger Bands in some very successful volatility-breakout systems.


The default parameters of 20 periods for the moving average and standard deviation calculations, and two standard deviations for the bandwidth are just that, defaults. The actual parameters needed for any given market/task may be different.


The average deployed should not be the best one for crossovers. Rather, it should be descriptive of the intermediate-term trend.


If the average is lengthened the number of standard deviations needs to be increased simultaneously; from 2 at 20 periods, to 2.1 at 50 periods. Likewise, if the average is shortened the number of standard deviations should be reduced; from 2 at 20 periods, to 1.9 at 10 periods.


Bollinger Bands are based upon a simple moving average. This is because a simple moving average is used in the standard deviation calculation and we wish to be logically consistent.


Be careful about making statistical assumptions based on the use of the standard deviation calculation in the construction of the bands. The sample size in most deployments of Bollinger Bands is too small for statistical significance and the distributions involved are rarely normal.


Indicators can be normalized with %b, eliminating fixed thresholds in the process.


Finally, tags of the bands are just that, tags not signals. A tag of the upper Bollinger Band is NOT in-and-of-itself a sell signal. A tag of the lower Bollinger Band is NOT in-and-of-itself a buy signal.


John Bollinger, CFA,CMT

© John Bollinger 2001



http://www.bollingerbands.com/services/bb/?type=rules
 
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