1. The fractional shares feature for US stocks needs to be enabled. 2. Orders can only be placed during US market's regular trading hours. 3. Orders do not guarantee optimal execution prices, especially during periods of fast market fluctuations where market orders may be executed at higher or lower prices. 4. If an order fails to execute due to risk control measures, company actions, or other reasons, the order status will be updated as "failed" and the system will not continue to submit the order. |