Last Friday's market movement showed that the 88,300 to 88,800 range was indeed a good position for shorting, ultimately dropping over 1,500 points. To be honest, this rhythm is very suitable for friends with some capital to do swing trading—above 5,000 oil is the most comfortable. $BTC and $ETH are two assets with particularly obvious volatility, and there are still quite a few opportunities for short-term oscillations. Instead of worrying about the big trend, it's better to seize these mid-range ups and downs. With good risk control, you can indeed accumulate quite a bit of profit.