On December 30th, Bitcoin fluctuated within a narrow range of $87,000 to $89,000. The intraday trading strategy is very clear—mainly focus on high sell and low buy, with quick take profits. The key is to closely monitor the BTC/USDT high-liquidity pair's movement and observe 15-minute K-line signals simultaneously to grasp the rhythm.

From a technical perspective, the support level is at $87,300. If this level is broken, there is strong support at $86,000. The resistance level is at $88,800, and above that is a strong resistance at $89,500.

How to seize trading opportunities? The downward opportunity is when the support at $87,300 stabilizes and trading volume increases; consider trying long positions. An RSI indicator below 30 is also a reference signal. Place stop-loss at $86,800. The upward opportunity is when a rebound reaches $88,800 and encounters resistance with decreasing volume; you can try short positions, with a stop-loss set at $89,300.

Risk management must be emphasized. Each trade should not exceed 2% of total funds. The risk-reward ratio for take profit and stop loss should be maintained above 1:1.5 to survive the volatility. Also, avoid trading during periods of very low volume, stay alert to ETF capital movements and BTC's correlation. If a false breakout occurs, exit immediately—don't hold onto false hopes.