1, even today's profit and loss, opening and closing positions on the same day, the final profit and loss amount.
Calculation method: (closing price-opening price) * quantity
2. Balance historical gains and losses and hold positions for more than one trading day.
Calculation method: (closing price-settlement price of the previous trading day) * quantity
The above also depends on whether there are multiple orders or empty orders. If there is more than one order, the (closing price-opening price) is greater than 0, the profit is less than 0, and a loss occurs. Empty orders, just the opposite.