This is a classic strategy by buying at a low price and to make a profit by selling when prices are higher, but also not easy to do because predicting price changes is difficult.
You don't have to follow the predicting prices, you can have your own entry and selling point.
All you have to do is to follow your own plan and study after buying the dip. Study on how much you're about to sell and how much you will take a re-entry.
Very well said, if you just follow, there is no room for improvement for yourself here.
Don't just rely, make your own strategy, let those traders who rely on paid service because they are just focus on short term profit and they don't see themselves having their skills develop in the long run.
It's difficult to succeed in trading, especially in the early stage but eventually as you make it your passion, you will improve in time.