I have another question about waitlisting...

I have put myself on the waitlist for a roundtrip flight.

How does this work if there is OUTBOUND availability on the day I want, but no INBOUND availability? I can speculate that they would not issue the award ticket until BOTH ways have availability. Right?

In other words, should I waitlist for one-way tickets? One-way INBOUND, and one-way OUTBOUND?