On December 15, 2025, BTC overall shows a oscillating and weak trend. The daily chart indicates a clear bearish trend, with the short-term range trading. The specific technical analysis is as follows:

1. Overall Trend and Moving Averages: The daily chart displays a pronounced bearish trend, with the three EMA lines in a bearish alignment, and a death cross signaling further downside. However, BTC is still within a large range of $85,000 to $94,500, having touched a low of $87,575 in the morning and quickly rebounded. As of around 13:00, the price has returned to approximately $89,600, and has not effectively broken below the lower support of the range.

2. Key Support and Resistance: Intraday resistance is focused on $90,450 - $90,650, with further resistance in the $92,000 - $94,200 range; support below is concentrated at $87,000 - $88,000. If this support zone is broken, attention should be paid to the support around $85,900.

3. Short-term Indicator Performance: On the 4-hour chart, the EMA trend indicator is spreading evenly around the candlesticks. The candlesticks have touched the lower Bollinger Band at $88,400, with the middle band at $90,500 forming noticeable resistance. The MACD bearish momentum is strong but decreasing in volume, with DIF and DEA showing contraction. The RSI on the hourly chart is approaching the oversold zone, indicating that short-term downside momentum may be slowing down.