You don't need to monitor the market all day; just focus on four key time points. The opening auction (9:15-9:25) is crucial. Orders can be cancelled between 9:15 and 9:20, but there are many false orders, making it less reliable. From 9:20 to 9:25, the order cancellation channel closes, providing more accurate price and volume data. For example, if a stock opens high with huge volume during this time, it might indicate the entry of major funds. The first half hour after opening (9:30-10:00) is a golden period of intense battle between buyers and sellers, where pent-up emotions from the previous day will erupt. The closing auction (14:20-14:40) is a time when major players might launch a surprise attack, influencing the stock price. The closing auction (14:57-15:00) determines the closing price and reveals the major players' predictions for the next day's market. Mastering these four time points makes market monitoring more efficient.