Profit is the profit you earn, MINUS the price difference and handling fee generated by your transaction. The main factors that affect the trading results are: average first-hand profit and loss, trading position, profit and loss times and transaction cost.

The formula for calculating the trading profit of spot crude oil is: investment income of spot crude oil = (average first-hand profit-transaction cost) × trading position× profit times-(average first-hand loss+transaction cost )× trading position× loss times.

Ask the old teacher if you don't understand. Q+ 462-5629-90 would be better.