Often times these are not exchanges. Bitstamp is unique in that it allows users to trade cryptocurrencies in a variety of ways that appeal to both users with novice and advanced levels of trading expertise. Note: Creating multiple accounts with the intention for sole ownership could result in a ban from the exchange, you may need to link multiple accounts together. Its owner are anonymous, but it is one of the most trusted exchanges because it has good support, has never been hacked, and has never run away with customer money. Check if the exchange has been around for a good amount of time and has built a solid reputation. Trading is relatively easy on Poloniex provided you have set up your funds through a deposit transfer and offers the standard stop-limits on all trades.