The real-time price shown in red on the left and blue on the right indicates the price of buying and selling BTC when trading. When you double-click the price on the left, you can sell 100 USDT worth of BTC at 58,240.2 USDT price, or when you double-click the price on the right, you can buy 100 USDT worth of BTC at 58,378.1 USDT price. (BTC buying, USDT selling).