Try to visit this site
https://coinmarketcap.com/. You can find not only the best exchanges that is connected to a certain coin but you could choose the cheapest price to purchase with the lowest market cap in the market and hundreds of coins to choose from. You could also review will the coins projects and specific details for your research need.
couldn't agree more. coinmarketcap represents a large information for us to do research. we can look at the current trending coins to see which coins have the most upward and downward trend. we can also see which coin has the most volume. furthermore, we can see which exchanges have the most trading volume for a particular coin.
however, there are also a bunch of coins which are not listed in coinmarketcap. they are those relatively new coins. if you can have information on these, it's also a great opportunity to do trading and get profits.