Mastering the various forms of Bollinger Bands is just the first step; the real test is how to translate it into profitable trading actions. I have summarized two of the most reliable strategies from my live trading experience: one is called "Convergence Breakout Method," specifically used to ambush when a trend has just started; the other is "Expansion Follow-Up Method," used to chase strong market trends. I will detail the operational specifics of these two strategies, how to set stop loss and take profit, and the key points of risk control.

First, let's talk about the convergence breakout method. The core idea of this trap is to ambush before the market starts to rise. So how do we do this? First, we need to identify the converging pattern—when the upper and lower bands of the Bollinger Bands are very close together, in the narrowest state in recent times, with very small K-line fluctuations and shrinking trading volume, at this point, we enter a waiting state. The second step is to wait for the breakout. The price should be accompanied by an increase in trading volume, effectively breaking through the upper band (bullish market) or lower band (bearish market); this is the real entry signal. After entering, how do we set the stop loss and target? The stop loss should be placed on the other side of the middle band—if it is an upward breakout, the stop loss is below the middle band; if it is a downward breakout, the stop loss is above the middle band. As for the take profit, we can first focus on recent highs or lows as targets, or decisively exit when the momentum of the channel expansion starts to slow down and reversal signals appear.

Next, let's talk about the expansion follow-up method. The logic of this strategy is to chase already established strong trends. In terms of operation, the first step is to identify the expansion - the Bollinger Bands have opened from a contracted state, and the price is running closely along the upper or lower band, indicating that the trend direction has been established. The second step is to catch the entry timing. In an upward trend, you need to wait for the price to pull back to near the middle band but not fall below it; at this point, you can enter the market. In a downward trend, the opposite applies: wait for the price to rebound to the middle band but fail to hold above it, which presents a shorting opportunity. Finally, set up stop loss and take profit; the stop loss remains on the opposite side of the middle band, while the take profit follows the rhythm of the expansion of the bands or exits when a clear reversal occurs.