The "arrow of time" conception of entropy: 1) does not work locally and only works at large enough scales, and; 2) is essentially isomorphic to the concept of t

The "arrow of time" conception of entropy: 1) does not work locally and only works at large enough scales, and; 2) is essentially isomorphic to the concept of time. So no, it's not at all incompatible with retro-causality. When you think about retro-causality, the idea that time "moves" is completely superfluous. Time is probably not even a real thing.