布林线技术指标和移动平均包络线相同，但是不同是外部布林线是怎样创建的。
A Bollinger band technical indicator looks similar to the moving average envelope, but differs in how the outer bands are created.
紧凑的布林线被交易员认为是整体波动增加将会出现价格剧烈变动的早期信号。
The tightening of the bands is often used by traders as an early indication that overall volatility may be about to increase and that a trader may want to wait for a sharp price move.
通常，向上部布林线移动经常意味这个资产将会被超买，向下部布林线移动则意味将会被超卖。
In general, a move toward the upper band can often suggest that the asset is becoming overbought, while a move close to the lower band can suggest the asset is becoming oversold.
实验结果证明，K线与布林线组合的房地产周期波动分析及价格趋势预测是一种有效的研究手段，能够反映房地产周期波动的特征及趋势，是一种值得推广的研究方法。
The experiment results show that it is an effective method to reflect the characteristics of real estate cycle fluctuations and forecast the price trend with the K-line theory and Bollinger Bands.
实验结果证明，K线与布林线组合的房地产周期波动分析及价格趋势预测是一种有效的研究手段，能够反映房地产周期波动的特征及趋势，是一种值得推广的研究方法。
The experiment results show that it is an effective method to reflect the characteristics of real estate cycle fluctuations and forecast the price trend with the K-line theory and Bollinger Bands.
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