Can be even more profitable if you buy lower and sell even higher..
Not bad. However, those in the know always buy at the bottom and always sell at the top!
Seriously, to answer the OPs question, let me start with an analogy: Let’s say you wish to create a gourmet meal for your friends, but you have no experience. You are provided with quality food and spices, all the dishes and utensils, and a natural gas stove and cooking book. Would you feel confident you could create a gourmet meal on your first try? On the second try? How about years of practice?
Almost anyone can make a living by going to cooking school or otherwise learning the craft. In trading, very few retail traders are able to earn a living, including quite a few who spend a lifetime trying.
I can vomit out a bunch of trading strategies for you, but without the judgement that comes from experience, you will still lose money. Traders can use the same trading strategy profitably by using it in a different way. For example, a momentum seeking breakout trader is either looking to enter on or anticpate momentum, while another trader is looking to fade momentum. The difference is trade selection and timing, where the momentum trader is likely to be more active early in the session and the fader is more likely to be active later in the session.
Trading is hard work through studying charts, learning the motivations of the various market participants, understanding the business side of finance, maintaining discipline and proper money management, and being adequately funded if the your goal is to try to be compensated for all the time and lost money will end up putting in.
Short term trading can be very counterintuitive, presenting a steep learning that most never climb.
Unless you are utterly passionate about the market and totally committed to learning this profession, you are best to avoid short term trading and invest into an ETF. Odds are, you’ll outperfom 90 to 95% of new retail traders.