To develop a trading strategy based on the current chart and EMA parameters, first clarify the cycle, trend phase, support and resistance levels, and indicator signals:

Step 1: Identify chart and indicator logic

- Chart cycle: You provided a 4-hour candlestick chart, combined with the labeled time span (September 30 - October 27), which belongs to a medium-short-term trading cycle.
- EMA parameters: You set EMA 12 (orange), EMA 50 (green), EMA 100 (yellow). Among them, EMA 12 is a short-term moving average reflecting recent price momentum; EMA 50 is a mid-term moving average representing trend direction; EMA 100 is a long-term moving average used to determine major support and resistance.

Step 2: Analyze price trend and key levels

- Historical trend: Price declined from the previous high of 4755.00 to 3394.00, then rebounded, currently oscillating around 4112.03.
- Moving average relationships:
- The short-term (EMA 12) crosses above the mid-term (EMA 50), with both turning upward, indicating a clear rebound trend in the short term;
- The long-term EMA 100 is around 4020.27, serving as an important support below.

Step 3: Formulate trading strategies (e.g., "Follow the trend long, betting on continuation of rebound")

Simulated trading should balance profitability and risk control, operating according to the following logic:

Strategy 1: Going long (trend continuation approach)

- Entry point: Enter lightly around the current price of 4112.03; if the price pulls back to EMA 50 (approximately below 4149.13, a minor support, or EMA 100 at 4020.27, a strong support), add to the position.
- Take-profit points: First target near previous rebound highs (refer to the 4300 - 4400 range, considering real-time resistance); second target can be the previous high of 4755.00 (monitor pressure along the way, take partial profits).
- Stop-loss point: If the price falls below EMA 100 at 4020.27 and closes below it, exit immediately (risk within 5%-8%).

Strategy 2: Defensive operation (if trend reverses)

If the price later breaks below EMA 100 (4020.27) with increased volume decline, indicating the rebound trend has ended, consider shorting:

- Entry point: Short after breaking below 4020.27 and rebounding near that level (when under pressure).
- Take-profit point: Target the previous low around 3394.00.
- Stop-loss point: Exit if the price recovers above EMA 100 (4020.27).

Step 4: Execution and risk reminder

- Trading can be somewhat "aggressive" but must follow discipline: prioritize long strategies (since the short-term moving averages are bullish and the rebound trend is clear), strictly track moving averages and key levels after entry, cut losses on breakdowns, and take profits in stages.
- Specific levels (using long positions as an example):
- Entry: Between 4100 - 4120 (build positions gradually to reduce cost);
- Stop-loss: 4020 (break below EMA 100, signaling trend reversal);
- Take-profit 1: 4300 (first rebound resistance);
- Take-profit 2: 4700 - 4755 (betting on the previous high, observe momentum).

By following the logic of "trend-following + adding to positions/stop-loss at key levels," you can grasp rebound opportunities and manage risk effectively during the testnet. Remember to monitor candlestick patterns in real time (such as large bullish candles confirming momentum, or bearish engulfing candles warning of reversal) and adjust strategies flexibly!