The recent trend of crude oil prices has remained low and volatile. Although there has been a rebound in the past few days, the overall trend is not very clear. At the daily level, Bollinger remained flat, with prices falling back from the upper track for three consecutive times to the lower track. The short-term trend is weak, but the price is near the lower limit of the fluctuation range and support is relatively strong. Breaking down is a bit difficult, and more importantly, there is a small rebound and oscillation to try again. We need to pay attention to the upper Bollinger medium track in the day90.5Nearby resistance.4During the hour, prices encountered resistance and retreated near the Bollinger track, running between the middle and lower tracks. There was no strong rebound in the short term, and as long as the price did not break through the resistance on the middle track, it was difficult to make a decent rebound. The daily operation was mainly focused on high altitude, with attention from above88.7-90.5Regional resistance.