In some professional books, the overfitting problem is sometimes also called curve fitting. Underfitting is just the opposite. It is often due to the fact that the selected strategy or model is too simple, has a weak ability to adapt to the inherent characteristics of trading assets, and has a low fitting level, so the profitability is weak. In terms of the specific manifestations of overfitting and underfitting, there are similarities and differences between the two. #whycrypto #xiaoyiclub #ETH #crypto2023 #Web3