In the T+ market, sometimes your transaction price is often the price reversal point as long as your reaction is one second slow, which is why people often say that once you buy it, it will fall, and once you sell it, it will rise.
The difference between institutions in the T+1 and T+ markets: Suppose an institution has 1 million cash in hand, and after it has been bought in the T+1 market, it can't operate. In the T+ market, this 1 million cash can be operated infinitely. If it is bought and sold for 1 times, it will become 1 billion. This round-trip operation is enough to make retail investors dizzy and unconscious. What else?