RQWL means Reservation queued waiting list . (RLWL) PQWL means Pool queued waiting list. WL means Waiting List. RAC means Reservation against Cancellation. Any of indian railway Ticket is Shows these terms. When the train journey has booked full tickets, the first 50 waiting tickets are booked on RAC, then next WL, afterwards PQWL and finally RLWL/RQWL. When some passengers Cancel their journey or reached their destination, the Waiting ticket are started to be confirm, where RAC takes executed with highest priority than WL or PQWL or RQWL. after with decreasing order W/L, PQWL, RQWL. Means the RQWL/RLWL will be get confirmed after above other categories hace executed.
I have booked rajdhani from delhi to new jalpaiguri with waiting status RQWL 15-16-17 on 18 oct 2012 but till date 03-Dec-2012 it has not moved a single bit. So i feel chances are grim that this will be cleared.
Check PNR status is best way to track your ticket status. Check IRCTC PNR Status by Visiting - http://www.travelkhana.com/travelkhana/check-pnr-status