I remember reading a story years ago - may not have been storiesonline. But the MC is a man who can commune with himself a few days in the past and a few days in the future. He makes lots of money by relaying stock picks.
He ends up with a girlfriend who wears a medallion which inhibits this power. He tries to get her to take off the medallion, but she is hesitant. When she finally does, it turns out the medallion keeps her from swinging wildly in time, past, future (physically).