Using Bollinger Bands by John Bollinger推荐.pdf

Stocks Commodities V. 10:2 (47-51): Using Bollinger Bands by John Bollinger Using Bollinger Bands by John Bollinger Trading bands, which are lines plotted in and around the price structure to form an envelope, are the action of prices near the edges of the envelope that we are interested in. Its not the newest of ideas, but as John Bollinger of Bollinger Capital Management points out, its one of the most powerful concepts available to the technically based investor, answering not whether absolute buy and sell signals are being given but whether prices are high or low on a relative basis. Trading bands can forewarn whether to buy or sell by using indicators to confirm price action. How do trading bands work? Bollinger, of Bollinger Bands fame, explains how. Trading bands are one of the most powerful concepts available to the technically based investor, but they do not, as is commonly believed, give absolute buy and sell signals based on price touching the bands. What they do is answer the perennial question of whether prices are high or low on a relative basis. Armed with this information, an intelligent investor can make buy and sell decisions by using indicators to confirm price action. But before we begin, we need a definition of what we are dealing with. Trading bands are lines plotted in and around the price structure to form an envelope. It is the action of prices near the edges of the envelope that we are particularly interested in. The earliest reference to trading bands I have come across in technical literature is in The Profit Magic of Stock Transaction Timing ; author J.M. Hursts approach involved the drawing of smoothed envelopes around price to aid in cycle identification. Figure 1 shows an example of this technique Note in particular the use of different envelopes for