Can the closing price and settlement price be used for profit in futures trading?

In futures trading, only the settlement price is used as a reference for winning or losing!

1, traded at 34240, with a closing price of 35245. The settlement price is 33,500, and the profit of the day = 34,240-33,500 = 740 yuan;

Suppose tomorrow is even, then I'll buy it for 33500. Can I make a profit? This question is not clear, is it to close the position or pay for a new one?

What's more, I bought 33500 in the morning and sold 34000 in the afternoon. Did I make 500? Yes!

Physical delivery of futures

Do you want to see big and small?

What does gold EOF42 mean?

Why did Lin Guangmao earn 220 times in cotton futures? Didn't the price of cotton go up by about 1 time?

Do enterprises have to pay income tax for losses?

What about Yichang Fanghua Culture Communication Co., Ltd.?

How to calculate the income of money fund

Which domestic futures companies can open American futures?

Is Shanghai Baosteel a state-owned enterprise or a central enterprise?

Since most financial markets are zero-sum markets, why did the financial crisis lead to a wide range of financial institutions and enterprises losing money and closing down?