Hello I dont understand I bought for 4000 Eur one hour ago of Ethereum when it was going up, it stayed around the 10-20%, it started to decrease 5 minutes ago so I sold it and now cex.io just gave me 3500eur for it... wtf... 
The %came from me watching livecoinwatch.. Cex.io doesnt have the accurate price ??
No accurate price on exchange you can see it on CMC so that you can compared what is the different to them and sell it to exchange that price are higher. If you are a trader don't buy on high price so that you can avoid losing your money.The %came from me watching livecoinwatch.. Cex.io doesnt have the accurate price ??