Summarize technical experience:

Breaking through support: See Figure ①

The opposite of the pattern in the uptrend. After a strong decline, the price tends to rebound slightly in the channel. The price then breaks down the support level, which marks the completion of the bearish flag pattern in the downtrend.

Support flagpole retracement: Figure ②

In the uptrend, the price forms a flag pattern after a strong rise, and then the price breaks through the resistance and continues to rise, marking the completion of the pattern. It should be noted that after breaking through the resistance, the resistance becomes support.