The core of the short-term trading strategy of opening and closing positions on the same day (#日内交易策略 ) lies in speed, accuracy, and control. First, within 15 minutes after the opening, identify the most volatile varieties by analyzing the increase in trading volume, and determine the breakout direction based on the high and low points of the 1-minute candlestick chart; second, set a fixed stop-loss of no more than 1.2% and use a staggered take-profit strategy, aiming for an initial target of 0.6%, and then adjust the protection level accordingly; third, strictly adhere to the discipline of "leaving the market after three unsuccessful attempts," avoiding emotional over-trading and holding onto losing positions. If encountering a low-volatility sideways market, it is better to stay out of the market and wait for signals instead of acting blindly. After the market closes each day, review within no more than 30 minutes, recording the profit-loss ratio, win rate, and execution score, using data to drive improvements for the next day. Stability, lightness, and speed are the keys to maintaining long-term positive returns.