Based on the market dynamics, technical analysis, and key event impacts on December 20, ETH is highly likely to maintain a sideways and slightly bearish pattern over the next three days. The specific outlook is significantly influenced by key events and the breakthrough of support and resistance levels. The detailed forecast is as follows:

1. December 20: As of around 14:00 on that day, ETH price is approximately $2952.76, fluctuating within the 2820 - 2984 range. The hourly chart shows a lack of rebound momentum, with significant resistance at the $3000 mark. In the evening, two major events to watch are the Federal Reserve Chair’s press conference at 21:30 and the expiration of $23 billion worth of Bitcoin options, which could trigger sharp volatility in ETH. If the news is bearish, the price may test support levels at $2820 or even $2750; if the bearish sentiment is exhausted and market sentiment improves, the price may briefly surge toward $3000 but face resistance and pull back.

2. December 21: The short-term trend is unlikely to shift from a weak sideways pattern. Some analysts previously predicted a price of up to $2858.81, aligning with the current weak tone. If the events on the evening of the 20th continue to drive a downward trend, ETH could test the critical support at $2750. If this level is broken, further declines are possible. Conversely, if ETH can hold above $2950 on the 20th, a slight rebound may occur on the 21st, but strong selling pressure in the $3000 - $3030 range will limit the rebound potential.

3. December 22: The market is likely to continue sideways or accelerate downward. If ETH cannot break through the key resistance at $3030 over the first two days, bearish sentiment may accumulate, increasing the risk of a breakdown toward around $2500. If ETH unexpectedly holds above $3030 during this period, a phase of corrective rebound could occur. However, given the overall downward trend remains unchanged, the rebound is expected to be limited, and resistance around $3050 is likely to be encountered again.

It should be noted that cryptocurrency prices are affected by macro policies, capital flows, and other factors. The above forecast is based solely on current market information, and actual market movements carry significant uncertainty.