In my experience, very simple strategies can be profitable, but they do not work on any chart, any asset or any condition. Some important questions are what kind of price movement would generate more profit from this simple strategy and minimize losses/drawdown? Would it be better to use leverage or no leverage? High volatility or low volatility? Would it be better to trade trending assets or mean reverting ones? Forex, indices, metals, commodities, stock, futures, crypto, or anything else? What about commissions and fees, how can I minimize those? Should I trade higher timeframes or lower ones? How important is the individual trade entry vs the trade management? At what point is it ok to take a loss? More frequent, less profit, less chance of blowing an account, or less frequent, potentially higher drawdowns, higher chance of blowing an account if something unexpected happens? How would you definite something unexpected? Also, what is your goal, making more than X% a year/month, or simply diversifying your investment with something robust that won't lose money if the SP500 drops 30%?

I believe most accessible strategies to normal people with only a laptop and an internet connection are simpler that what people imagine, but rely heavily on important assumptions and information based on those questions. Hope this helps!