To develop a trading strategy based on the current chart and EMA parameters, it is essential to first clarify key information such as market trend, moving average relationships, support and resistance levels. Below are specific analyses and operational suggestions:

1. Technical Indicators and Trend Analysis

From the 4-hour candlestick chart and EMA parameters (12, 50, 100):

- Short-term trend: The price is currently around 3876.14, with EMA12 (orange, representing the short-term moving average) at 3874.09, EMA50 (green, approximating the medium-term rhythm) at 3867.04. The short-term price is oscillating near EMA12, with no clear breakthrough direction.
- Long-term trend reference: EMA100 (yellow, representing the long-term moving average) is at 3929.17, below the current price, indicating an overall weak trend.
- Support and resistance: Strong support is at the previous low of 3394.00, and resistance is at the recent rebound high of 4291.59. The current range is oscillating between 3800 and 4000.

2. Trading Strategies and Specific Levels

(1) Conservative "Trend Following + Swing Trading" Strategy

Suitable for traders with moderate risk appetite, relying on moving averages and support/resistance for high sell and low buy:

- Long opportunities: If the price retraces to the 3800-3820 range (near EMA50 and previous support), and a bullish candle confirms support, consider a small position to go long, targeting 3900-3920 (near EMA100 resistance), with a stop-loss below 3780 (to prevent a valid breakdown of support).
- Short opportunities: If the price rebounds to the 3920-3950 range (near EMA100 resistance), and a bearish candle shows pressure, consider a small position to go short, targeting 3800-3780, with a stop-loss above 3980 (to prevent breaking through the long-term EMA).

(2) Aggressive "Breakout" Strategy

If aiming to capitalize on trend breakouts, monitor key levels for breakout signals:

- Upward breakout: If the price increases with higher trade volume and breaks above 3950 (stabilizing above EMA100), chase long positions, targeting 4050-4100, with a stop-loss below 3920.
- Downward breakout: If the price effectively falls below 3750 (the previous oscillation lower boundary), chase short positions, targeting 3500-3400 (near the previous low of 3394), with a stop-loss above 3800.

3. Key Risk Control Measures

- Keep position size between 30% and 50%, avoiding full exposure.
- Strictly execute stop-loss orders; once triggered, exit immediately and observe for the next signal.
- If the price oscillates within the 3800-3920 range for over 24 hours, consider temporarily observing until a clear breakout direction emerges.

Following the above strategies, combined with the rhythm of "weak trend first short, then long," the current bias is to short on rebounds to the 3920-3950 range, targeting 3800 with a stop-loss at 3980, or go long on dips to the 3800-3820 range, targeting 3900 with a stop-loss at 3780. Adjust flexibly based on real-time market fluctuations. Wishing you success in the Testnet competition!