Custom Metrics · BOLL Advanced Tactics 1、 What is BOLL Bollinger Bands (BOLLs) are known as the "dual kings of trend and volatility" in technical analysis, and are highly praised by traders for their precise capture of trends and flexible reflection of volatility. Especially in the highly volatile market of the cryptocurrency industry, it is a "trump card indicator" for investors to guide trading decisions. The market fluctuates rapidly and within an uncertain range, making it difficult for ordinary indicators to accurately grasp trends. However, the Bollinger Bands, with their dynamic upper and lower range and mean regression theory, help investors identify trend breakthroughs, capture volatility opportunities, and determine overbought and oversold areas. Unlike traditional fixed interval indicators, Bollinger Bands have the advantage of "changing according to the market". It can adjust in real-time with market fluctuations, suitable for following breakthroughs and chasing orders in trend markets, as well as cleverly adapting to reversal operations of high selling and low buying in volatile markets. In the cryptocurrency industry, it is regarded as a core reference tool by many professional quantitative strategies or short-term traders. High volatility brings high returns and high risks, and the significance of Bollinger Bands lies in helping traders accurately grasp market sentiment and effectively control risks.