Second, the principle of micro-differentiation: the time of profit, loss and position (especially loss) of "micro-differentiation" is controlled within a few dollars of the price difference. Stick to the post for the longest time, just a few minutes; The shortest, only 2 or 3 seconds. Decisively enter and exit, and never delay holding loss orders for any reason for a long time.
Third, the principle of independence: the profit and loss of the previous transaction has nothing to do with the next transaction. The decisive entry and exit of the next transaction cannot be affected by the profit and loss of the previous transaction or the entry and exit price.