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 ??
You can see that the market in the early months of 2018 is in crisis, the price of bitcoin and altcoin in the past few days has been continuously reduced and there are no signs of specific recovery. So you trade at this time the possibility of losses will be very high, no but can not profit but also lose assets in just a few transactions.The %came from me watching livecoinwatch.. Cex.io doesnt have the accurate price ??