Introduce the "sweep" signal into the wave structure. In a downtrend, after the price has risen and a candle closes with a higher body than the previous one, forming a temporary bottom, and then the price continues to decrease but only the candle's wick breaks below the low, followed by an increase in price and candles with bodies breaking above the high of the downtrend, this creates a bottom sweep. In an uptrend, the opposite applies.