The price difference of each platform is different. The difference between your purchase price and the current price is called the price difference. Buying means doing more. If you buy 1 and go up to 3 yuan, and then you sell it, you earn 2 yuan. Selling means shorting, selling 3 pieces, repurchasing 1 piece, and you also earn 2 pieces. This is a two-way transaction. If you have this position, just ask!