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I understand what you want but it is very difficult as you are looking for some kind of secret information that can easily help you to do this and this does not exist, the only way to recognize if a coin is any good or not it is to know about the technology behind cryptocurrencies in a profound way, if you do not know this then you are just gambling with your money if you invest in those altcoins, so unfortunately I do not think you have what is necessary to achieve the results that you want to get.
Indeed, some people just joined the signal groups because they think that this is the answer to their call to make rich. But unfortunately, they don't notice that these people are milking them from their hard work money. Because the reality is that these signal groups have to do nothing with us, they make their own analysis which we can make it as well.
But I could say that trading is like gambling and the result it is either we gain profit or just lose.