The BTC intraday market is overall showing a fluctuation upward trend in the range of 86200-87500, with the moving average system gradually moving upward to form long positions. The volume on the daily chart is shrinking but has closed positively, with a key resistance level to watch around 90000.

The four-hour chart shows that the bearish momentum is weakening, with a decrease in volume leading to five consecutive bullish candles. Short-term resistance is focused around the 88500 level; the hourly chart maintains a stepwise upward rhythm, and the bullish structure is solid.

It is suggested to pay attention around 86500, first look at around 88500, if it stabilizes effectively, then continue to look up to 90000.