Looking at the 15-minute chart of 1000CAT/USDT, recent trends have shown quite a few bearish signals. Based on the current technical analysis and volume performance, a relatively clear short-selling strategy is outlined, with a risk-reward ratio set at 3:7.

**Entry Logic**
Once the price rebounds to the 0.00312 level, it becomes a key entry zone to watch. However, do not blindly short; the key is to see if the 15-minute candlestick forms a clear bearish pattern—such as a bearish engulfing reversal signal or a shooting star pattern indicating a top test. Also, confirm that the trading volume has not increased significantly, indicating that the rebound lacks buying support. This increases the probability of a successful short.

**Risk Management**
Set the stop-loss at 0.00315. If the price breaks through this level, it indicates a technical failure, and a decisive stop-loss should be executed to prevent larger losses.

**Target Setting**
Divide the take-profit into two levels to lock in profits. The first at 0.00309, where you can partially close your position to secure gains; the second at 0.00307, near the support level, where you consider exiting all positions. This stepped profit-taking approach ensures profit realization while allowing sufficient downside space for the market.

Short-term trading opportunities are concentrated around these key levels. With good technical analysis and risk control, the probability remains quite favorable.