Bitcoin has already broken through a critical bullish support line, shifting from a bullish structure to a bearish one in the short term. The current trading strategy boils down to two words: look for rebounds to sell, and defend support levels to buy the dip.

**Bull-Bear Boundary Line: 90,450.7 USDT**
This level has been broken, now turning into a resistance. If subsequent rebounds fail to push above this point, the bearish trend will continue to extend.

**Three Shorting Zones Above**
P3 is at the psychological level of 92,000, P2 is at 91,600 (the previous consolidation top), and P1 is at 90,450.7 itself. Rebounds to these levels are opportunities to short.

**Three Support Levels Below**
S1: 87,717.9, which is a recent low and a confluence of support levels, serving as the first target and main battleground.
S2: 86,244.8, the lower boundary of the previous large-range zone, a strong support.
S3: 85,220.2, the previous low area; breaking this could open up a larger downside space.

**Trade Execution Details**
Placing orders within 100–150 points above or below these levels is considered reasonable. Stop-loss is set at 1200 points (for beginners, take profit at 1:1; experienced traders may reduce positions at 50%–75% and move stop to break-even).
Maximum of two preset orders per day; if daily loss reaches 10% of the principal, forced休息—stop trading. Don’t stubbornly hold on.

From a long-term macro perspective, this remains a wide-range oscillation pattern, but recently it has indeed been leaning towards a bearish rhythm.