What are the main websites and tools that are used for research purposes? This forum does help but what other websites would be useful?
Generally there aren't much research tools for cryptotrading. The best thing to do is watch particular altcoins and do your own research. For example, if you are looking at ETH and you want to invest into that altcoin then you can follow the developments of ETH and see for yourself if the value of ETH is undervalued or overvalued. Then decide whether you would long or short ETH from your own research.