Thoughts on best trading platforms for crypto-currencies ?
ETHERDELTA so far I work best here. Bittrex is cool but has limited capabilities. It really depends on you.
And etherdelta doesn't? I mean, if you like to trade erc20 tokens etherdelta is good choice because all erc20 tokens are listed, and even some of them are not listed you can always add smart contract and trade.
On exchanges such as bittrex, poloniex and similar you can trade altcoins and limited number of erc20 tokens. Choosing right exchange depends on what are you looking for.