To select stocks by Tong Daxin's stock selection formula, you need to download historical data, and click the main interface-System-After-hours Data Download-.It is best to set the time for the first download. From January 1st, 199 until the closing interval of that day, only the minutes of Shanghai and Shenzhen can be downloaded. Practice shows that:

1. Every opening trading day between 8: 5 and 9: 3, formula stock selection will fail. No matter what formula stock selection, the result is , so we should avoid this period.

2. The historical data is incomplete and the results of stock selection are incomplete.

3. Sometimes other programs occupy computer resources, which may also lead to stock selection failure.

4. after the stock selection fails, if the historical data is ok and no other programs occupy resources, close the software, reopen the software, and perform the stock selection again.

Tips: The above contents are for reference only, not as any suggestions. Investment is risky, so you should be cautious when entering the market.

response time: 221-12-21. please refer to the latest business changes announced by ping an bank in official website.