ETH order sold off, summarizing... I discovered some market maker techniques. I'll observe next time. When I started to insert the pin at 4167, I would take profit at 180 because I found that below 167 is a liquidation dense area, and generally above a dense area is a strong support level. According to liquidity, liquidation should definitely happen, but it didn't. I was also puzzled why it didn't break down directly, thinking that market makers controlled volatility to avoid a chain liquidation. In the end, I realized I was naive; how could capital not be greedy? It's just more sophisticated. After the rise, they cautiously liquidate a little bit at a time, maintaining a thick buy order. See the attached image. Next time when in profit, observe and be patient to try to sell at the limit.