You have to do your own research or look for a website that has expertise in charting cryptocurrencies. There are also a bunch of YouTube channels that do charting for some of the cryptocurrencies. I don’t know how much to trust these though. We have no way of knowing if these people are experts or not. The best thing you can do is track how accurate they are over a period of time before acting on their recommendations.
Yes we can do researches on how that crypto coins will be having good trades and potential higher value will be possible in the market. Youtube channels can help, but we could not rely on it all the time because it was just a form of advertisements and the full details about with the website of the coin to invest with. All information of the development of the currency can be found in their website, and with the help of that ways to determine potential trade you can decide how its going to provide us good trading activities as well as to hold or sell in quicker decisions.