When we consider about trust we have to consider about charges too.When we transfer coins from any exchanges they charge a fee.Some time ETH value is 8$.This is too much.When we use Etherdelata it use more less than that.

By considering that I can list according to my choice
1.Etherdelta
2.Binance
3.Kucoin
4.Bitterex
5.Hitbtc
6.Bit-z
7.Cryptopia


This is my selection.It can be differen from each other.