$bigtime is said to have a high explosion rate and is a short selling point. oi is very bad, and the long-short ratio is also bad to a certain extent. Go in and take a swing when it is clear to make changes. If you have a large position, don't be reluctant to fight. Casual changes will cause relatively large fluctuations. However, according to past experience, if the direction is good at the beginning, it will rise. However, no matter how many times it changes, it will not be able to affect the general trend and start a downward spiral.
