If you want to study finance and trading, I think it's important to know how to identify patterns. Bull flag and Bear flag are two of the major patterns in financial markets - https://tabtrader.com/academy/articles/what-are-bull-flag-and-bear-flag-patterns read more here. If you study finance, they appear often. The best way to learn them is by practice. Go through your favorite stock charts and look for them. After that, you can have more than enough information to understand when they appear and what they mean.