Bitcoin rose and then fell last night, failing to maintain after breaking 90000. The 4-hour candlestick shows a long upper shadow, with the Bollinger Bands diverging downwards. After touching the upper band, the price faced pressure and fell below the middle band. Currently, it is in a range-bound fluctuation with no unexpected positive news or further declines anticipated. It is advised to primarily focus on short positions.

Bitcoin:87000-87500 short, looking at 86000-85000.