Based on his post, he is trying to teach tutorials as an expert here. His name suggests he is one of the paid shiller of Bitget exchange which is trying to blend in the forum as new account and sharing tips.

However, the tips that he share is accurate method which even pro traders will suggest for newbie trader. The method above is the most common strategy or sign on when the best to enter. BB(Bollinger Bands) is one of the best indicators to know when the price is already at the limit of reversing the trend.

Overall, he share a simple yet helpful insight despite the OP is obviously Bitget shill account.