Does anyone know if you can push pcs orders to the right?

I re enlisted for alaska recently and I report in Feb of 2019. The unit I'm in now may deploy again not too long after that. I'm trying to catch another deployment, is it possible to get locked in for the next deployment/ get my orders pushed to the right? It's a 6 year contract, 1 year of overlap, 3 at Alaska, and 2 needs of the army. Anyone know if there's a loophole somewhere?