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.
What do you base your analysis on? Fundamental analysis, technical analysis or sentimental analysis? After picking potential coins on coinmarketcap, CoinGecko... What do you do next? If you're just blindly buying coins, then you're doing it wrongly. I started like that and I learnt the hard way. I've seen other people who make this same mistake.Next time, After picking coins, do a bit of FA and TA before clicking the buy button.