BNB, the four-hour Bollinger Bands are currently in a constricted state, with prices fluctuating between the middle band and the upper band, where the upper band is exerting pressure on the price.

If the price fails to break through the upper band and falls back to the middle band, or even drops below the middle band, it may further open up downward space, providing opportunities for short positions.

Short around the 690-695 area, with a target of 680-650.