a probable solution for OP must be going for any call generating houses. I have tested few of them in telegram and physically also but none of them are as per my expectation. It is always good to go by our own research and analysis. Because, no one will be caring for our capital as much as we will do. So it is always risky to go for buying recommendations from any third party.
Yes, we only will be taking care of our capital more consciously and others will just sell recommendation for earning money for them. But OP is asking about any tools for finding good investment opportunities. I'm sure no such tool will be available but we can make use of any technical analysis tool for trading.
It means we need to find the any good investment opportunity among altcoins and then we can go for technical analysis using those tools then we can trade them effectively for profit making.
I'm seeing many people are not at all using their brain for filtering altcoins to find out the right altcoins. There could be multiple reasons why they are not doing on their own but finding a potential coin must be derived through our own research and analysis otherwise we cannot blame anyone else for losing our capital later on due to investing into inappropriate coins. We must spend our time to protect our capital, depending on others for maximizing our capital will not fetch the expected results.