In your opinion whats the best exchange my ALT coins? ( Cheapest aspect )
why?
EtherDelta is a good exchange for new starters (new projects that after Initial Coin Offering want to start trading asap) It's a little complicated at first but once you learn how to use it it's really simple and easy to use. Create account takes 1 second, and there is no verification process - it's decentralised exchange. ED is only for Ethereum based Tokens (ERC20).
Bittrex is one of best exchanges in the crypto world and longest on market. You will need to spend more time on registration and verification process, you can setup 2FA for more security too.
Only best coins/tokens are listed on Bittrex, so if your favourite Token is not there it may take a long time before getting listed.
I personally use EtherDelta most of the time, but if there is big difference in 24h volume always best choice is to trade on exchange with the highest volume (better price, more liquidity) If you want quick check volume visit
www.coinmarketcap.com and click on markets. EtherDelta have low fees, you can wait a little longer with Gas Limit 4 (default) or crank up to 8, 16 or 21 for much faster-executed transactions. Both are good and have pros and cons.