i've been staking for 6 days now, but still no reward... how's this possible. The wallet is 80% of the day open for staking.
Use the following shortcut to calculate the hours until first stake rewards (assuming 5% reward)
350400 / Number of XSPEC = Hours till first Stake
To expect to receive a stake in less than 6 days, you need to hold more than 2500 XSPEC.
(Calculation is only approximative. In particular, the real return right now is more like 10%, so the number of XSPEC needed would be in the order of 1250. On the otherhand, there is also the luck factor which needs to be accounted for)