The indicator has drawn three lines on the map, in which the upper and lower lines can be regarded as the pressure line and the support line of the stock price respectively, and there is an average line of the stock price between the two lines, and the parameter of the Bollinger Band indicator is preferably set to 20. Generally speaking, the stock price will run in the channel formed by the pressure line and the support line.
Like MACD, RSI, KDJ and other indicators, BOLL indicator is also the most practical technical analysis reference indicator in the stock market.
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