**Cryptocurrency A Trading Strategy (Short-term Trend-based)**

**Core Logic**:

1. **Trend Confirmation**: When the 4-hour EMA20 is upward and the price stabilizes above EMA7, it is determined to be a bullish trend.

2. **Entry Timing**:

- Buy on dips to EMA7 or the middle band of the Bollinger Bands;

- Chase the price when breaking previous highs with increased volume.

3. **Exit Signal**:

- Reduce position when RSI > 70 or a long upper shadow appears;

- Liquidate when falling below EMA20.

4. **Risk Control**: Individual stop loss within 3%, position size ≤ 10%.

(Note: Adjustments should be made in conjunction with the overall BTC market trend and project dynamics.)