让我们继续进行挑战的第三部分,第一部分和第二部分可以在上面的链接中找到。 Applications BBIBOLL Bull and Bear Index Bollinger Bands (BBIBOLL) is similar to Bollinger Bands. It also comprises of 3 bands: upper and lower bands, and the BBI middle band. The BBI is also known as the Long-Short Index. In$常青石油及天然气 (T13.SG)$价格移动到BBI之上时,该股票进入了上升趋势。