I understand what most of you are saying. However why cant anybody answer this question:
On cex.io the price to buy 1ETH is much higher than the price to get it back + the fees...
For example it costs 800$ to buy 1ETH but when you sell back 1ETH you receive much less. So not only are there fees but there is also a price difference.. How can one trade successfully if the exchange rates are like this. Can someone please comment this.
I'm not very familiar with CEX.io but on exchange like WEX.nz or GDAX.com the buy and sell prices are not as drastic, usually less than 1%, sometimes as little as 0.1%. The answer might be you need to trade on another exchange if cex.io has such extreme fee's.
The only crypto that I have seen with $100usd spread is BTC, but even then it's less than a 1% diff between the buy and sell prices.