The question my friend asked is very good, I also overlooked it. The calculation method for winning with two coins is as follows: OKX: It is based on the average price one hour before settlement, which is the average index price between 3:00 pm and 4:00 pm (Beijing time) on the maturity date. In human terms, if the average price for this hour is below $40000, then your $40000 purchase is considered a transaction. That is to say, if the final settlement is $40001, but the average price per hour is still below $40000, you can still make a deal. If the average price is above $40000, then you cannot make a deal, even if the last minute price drops to $30000, but the average price is above $40000, then you cannot make a deal. Binance: It's based on the average price 30 minutes before settlement, everything else is the same. Therefore, one of the biggest drawbacks of winning with dual coins is that it depends on luck when it comes to buying coins. It's not guaranteed that you will get coins, but it still depends on the settlement price. For example, I bought BTC with dual coins at $63000, but the settlement time was 4:00 pm on February 9th. So it turns out that even if the price drops to $30000 in the middle, it doesn't matter to me. Only the average price in the last half hour (Binance) can determine whether I can buy, so my current pending orders are also uncertain like a fan. But for me, I am happy to be able to buy. This is the price I prepared. If I didn't buy, I also earned some pocket money.