Self-developed high-probability short-term EA "Lu Dao Tian Yan". It has been running for 7 years. If following the capital ratio, most market fluctuations result in a loss of 8% or less. The maximum drawdown in 7 years does not exceed 25% (past performance does not guarantee future results). The stop-loss is set at 30%. It is possible to intervene for stop-loss in advance. The probability can be referred to historical data. Enter and exit in batches, generally not overnight. There is a set target price to prevent profit-taking. The annualized return is 50%. Trailing trading must accept low frequency because on average, only 50 transactions are made per year.