I am not positive what you are asking, but the rewards are based on a number of things. Your voting power increases as time progresses when you are not using it. However, when you vote on a post that post will still receive your voting power in real-time (I believe). The value of an upvote is determined on the price of steem with a 3.5 day rolling average. So, your posts will go up and down till you receive your rewards in the 7 days after the initial post.