No one can chance anyone for getting off a WL because 1) No one knows why your student was wait listed and 2) WLs are used to fill holes left by those who choose not to matriculate. So, if a hole is for a female dancer, no males stand a chance. If a hole is for a male soccer player, the female dancer doesn’t stand a chance. If all FA has been allocated, then no student requiring FA has a shot unless an FA admit declines and returns adequate funds to the pool. See how this works?
Wait lists can be deep (even more than the number of admitted students) and are not ranked. Also, one student declining an offer of admission ≠ one student pulled from the waitlist.
The waitlist operates as a safety net for the school and, in a good year, it will never be used. The schools plan on a certain percentage of their offers being declined. If and only if the actual number exceeds that figure will there be movement on the waitlist due to inadequate enrollment, so to get off the WL, a school will have to have over-estimated its yield rate. Then, when a school does go to the WL, it is to replace the profile of a student who declined. I know this can be hard to hear when you are waiting, but it does help to explain why a school may not go to its WL even if you know kids who have declined spots or, due to a profile match, why one kid gets off the WL over another.
We have a pinned thread that runs the gamut on how to deal with wait lists. You might start with this classic response which pretty much covers it.