Generally when one team is substantially more rested it is the home team. But when the road is much more rested, there is an overlay because the normal home court advantage does not apply.

Miami back-to-back and three games in four days and four games in five nights while Boston is rested. Furthermore, the Heat are in a funk, having lost 4-of-6 straight up and against the spread. Yes, they are returning home, but with plenty of jet lag. Boston is well rested and have not played back-to-back since January 11.