aa)every race has a large pool, probably the only races that might run smaller are griffins/large number of imports. live odds from hk
https://bet.hkjc.com/racing/pages/odds_wp.aspx?lang=en. On the results page, thats the race value
bb)its a factor obviously from a science perpesctive, how much it is, can't tell you. But if a jockey is caught out wide with a reasonable to chance to get in, he'll get blasted by the stewards
cc)no data on that right now
dd)ST favs on turf just under 30%, ST AW 26.5%
ee)class 5, just like in NA, lower the class, the more variance there seems to be
ff)think you got it backwards, betting is open till the gates fly, and then the final odds cycle will go thru. In HK, with less than 5 MTP I think, odds cycles are every 15 seconds.
gg) yes
hh)most online adw's require you to be a resident of the state I believe, most OTBs arent open, even without covid impacts, due to races happening between midnight and 10am est
ii) you have to bet using the standard US rules so min bet is 1.00 usd and some bets might allow 10 cent increments, these amounts are converted to HKD if they are rolled into the HK pools just like Canadian dollars is converted when betting into US tracks or vice versa.