I like marketcap but I found this website - https://www.worldcoinindex.com/ and its not bad at all, actually I really like it.
Most ICOs are scam, so... man if you have to do research on most... your time on Earth will pass :D and as I see more and more ICOs are coming!!
I agree on Long Term on what you believe in.
But here comes the trick.. one's gotta know when it's the up and when is the down ...and simply technical analysis don't always work on crypto, its just way too crazy :)
So, final words - hold is the only choice sometimes lol