from my experience, trading indicator doesnt work well in crypto. i test many time and often fail with those indicator
i believe in price action which can work better than indicator. furthermore, price action is simpler than indicator
I often used CoinMarketCap, CoinCodex, and CoinGecko to find the most profitable altcoins to buy.
They are also free tools but it may take some time to find the right coin to buy don't rush as a beginner. Make sure to analyze the market carefully.