CURRENT PRICE BTC/GHS 0.00124
it says but when I try to buy it´s 0.00154.
This sort of thing kind of lowers your interest.
0.00154 - hourly payout!
0.00124 - monthly payout
Why are you so surprised? By default buying new contract is on monthly payout so you had to see 0.00124 price prior to changing it to hourly/manual payout...