For example, for example, you 10000 yuan opened primary soybean oil and bought it for 7000 yuan. Today's closing price is 7 108.

By three o'clock, you make a profit 108 × 10 (the trading unit is each lot 10 ton)-10 (handling fee). Actual profit today 1070.

As there is no liquidation, the trading rule is debt-free daily, such as the settlement price of 7080.

After settlement, your actual profit on that day is 80 points × 10- 10 (handling fee), that is, 790 yuan's profit, which belongs to the position profit and loss. Actually, after the settlement tonight, your capital is 10790, not 1 1070.

If soybean oil continues to rise the next day, such as the closing price of 7200. Your profit today is10790+(7200-7080) ×10, which is your profit at three o'clock today.

For example, today's settlement is 7 150. Your fund is actually10790+(7150-7080) *10.

And so on: If the price starts to fall on the third day, for example, you close your position on 7 120. Your fund profit and loss on that day is a loss (7150-7120) ×10.

So you can compare it with the profit and loss before you opened the position.