Annual percentage rate (APR) represents the yearly interest or reward rate generated by staking FXCE.
For example, the current APR, if you select the 120-day duration, is 13.68%. Basically, for every 1000 FXCE that you stake in a year, you will be rewarded with another 136.8 FXCE yearly. If you just subscribe to it for one period, your periodical reward will be 136.8*120/360 = 45.6 FXCE.
Detailed APR for each duration as shown below: