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 ??
The %came from me watching livecoinwatch.. Cex.io doesnt have the accurate price ??
That is why its called trading where at any moment, neither a minutes, or hour the price value can change at once. And you lose because you lack of knowledge about in trading just simple as that. You must also know how to read on the graph as well too.