I don't remember my method well, but 9am @ GMT+12 (NZ) seemed to be the best time to list (around 12-2pm USA ish, correct me if wrong), less competition from farmers in the USA region dumping their loot at 11-12pm before going to sleep, and our auctions will be waiting for them when they come home from work.
If there's a way to measure traffic on the auctionhouses over time, and compare it to # of listings, # of successful auctions, total gold spent on the auctionhouse per hour etc...that would be very nice.
I don't expect it though.
I think there should be a way to figure out a rough guide to auction traffic, based on player activity in other online games that include an AH, and the avg number of players that should be online, based on a timezone map.
The Goal (ideally):
A chart, or list of the times major traffic-waves passing through the Gold/RMAH, and later on maybe info on gold price fluctuation, and how it relates to the traffic-waves passing through.
Knowing a few basic times to search for bargains when a lot of players have probably dumped their night's loot, or listing in time to catch players starting fresh for the day.
I'm not experienced with reading a timezone map, if anyone here is comfortable with that stuff, or knows a good site that makes it easier, I'd appreciate your help :-)
This is meant to be casual, DIY info. Just has to be 'good enough'.