Reviewed the data before yesterday afternoon's drop. The data before this drop was actually very normal. Spot selling, contract selling, open interest increasing. The only interference might be that the buy orders in the lower order book were slightly thicker. The purpose of this kind of order book is to prevent the price from dropping too quickly, not to pump the price. The hardest part is actually the bull trap and bear trap. But if you look closely at the data, you can still identify them pretty well.