BTC today's trading strategy: future bullish, the 4-hour middle band cannot be broken, once it breaks, the long order ends. Key levels: 90400, 88970, 88560, 87500.

Resistance levels: 91200 91700 92700 93200 94200 94600 95500 96800 97200
Support levels: 90400 89400 88900 88500 87500 88100 87500 86300 85500 84500.
If it breaks through, it must have a stop loss of 350 points.
You can choose to use 1% for the first position, and if it breaks through a few times, you can choose 2%.
Breakthrough below, pressure and support transform into each other.