The only way to make money at CEX.IO is buying low and selling it at a higher price (assuming it goes higher).
How can i provide that? Does something real could influence the trend?
Not sure what you're asking. When you buy 10GH/s for 0.34
BTC and then sell it for 0.38
BTC you make 10x0.04
BTC = 0.4
BTC (plus any mining revenue).
The reason everybody isn't doing this is because the price should be continually heading down. The only reason for it to go up is uninformed new buyers... so basically you make profit at the expense of, for a lack of a better term, stupid noobs.