Based on this 15-minute candlestick chart, ETH has rebounded strongly after testing the bottom at 2118.20, once surging to 2137.41 but then encountering resistance and pulling back. Currently, the price has fallen back to around 2130.20. Although the MACD is showing a bullish crossover above the zero line, the red histogram is shrinking, and the price has broken below the MA5, indicating short-term correction pressure. It is recommended to adopt a "sell high, buy low, range trading" strategy.

Core Market Signal Interpretation
- Trend: The rebound trend on the 15-minute timeframe remains unchanged, but short-term upward momentum is weakening, entering a correction phase. MA10 and MA30 are trending upward, providing support below.
- Momentum: MACD shows a bullish crossover but the red histogram is shrinking, DIF shows signs of turning downward, indicating weakening bullish strength and a resurgence of bears.
- Risk Points: Resistance around 2137 causes a pullback, forming a short-term top. If the price breaks below MA30 (2126.69), the downtrend may resume.
- Key Levels: Resistance at 2137.41 above, support at 2126.69 (MA30) and 2118.20 (previous low) below.

Specific Trading Strategies

Strategy 1: Buy on dip at support (main strategy)
- Logic: The overall trend remains bullish; wait for a pullback to key support levels to stabilize before entering.
- Entry Point: Price pulls back to the 2126–2128 range (near MA30) with signs of stabilization (e.g., long lower shadow, small bullish candles).
- Stop Loss: Break below 2124 (a little below MA30).
- Take Profit: First target at 2134, second target at 2137.

Strategy 2: Short on resistance during rebound (secondary strategy, for expecting a correction)
- Logic: Use the current correction momentum; go short when the rebound shows signs of weakness.
- Entry Point: Price rebounds to the 2134–2136 range but fails to break previous high, with bearish candlestick patterns (e.g., shooting star, engulfing).
- Stop Loss: Hold above 2138.
- Take Profit: Target around 2128–2126.

Strategy 3: Short if support is broken (aggressive strategy)
- Logic: If the price effectively breaks below MA30 support, the trend may reverse, and a short position can be taken.
- Entry Point: 15-minute candlestick closes below 2126.
- Stop Loss: Rebound back above 2128.
- Take Profit: Target near the previous low at 2118.

Summary
Currently, ETH is in a correction phase after a rebound, with short-term weakness. In terms of operation, it is not recommended to chase longs at the current price of 2130, as resistance above and support below are close, resulting in a poor risk-reward ratio. Patience is advised—wait for a dip near 2126 to go long, or consider shorting around 2135 during a rebound for a more prudent approach.