To answer the question:
Always!I bet on horse racing, 10 minutes befoe the race the horses are paraded in the ring, then of you ave good eyes on tv or you're actually there you will see, a horse that is nervous, a horse sweating abnormally, a horse that unlike previous times is calm and has composure, or a horse that has picked a ton of mass muscle since last time, espcailyl with 2-3 yo.
If you have a market mover from 3x to 2x or even coming down from 4x to 2.25-2.00 x something has been seen in that ring!
Here is the betting for a favorite that won today:
6/4, 11/8, 5/4, 6/5, 11/10, 1/1, 11/10 from 6/4 (2.5x) to 1/1 aka 2X.
Just last time, in the NBA Finals Game 4, the San Antonio Spurs had a x2.70 odds money line many hours before game time. Then, it changed to x2.75 just minutes before the game. We don't really know if many gamblers are attracted to the odds, or if something is happening behind the curtain for the oddsmakers to suddenly change it. But I am guessing it's because of the hype that the Spurs might tie the series.
It's the opposite.
If the Spurs went from 2.70 to 2.75, it means people were betting on the Knicks!
Spurs would have had to go 2.65 if money was coming their way!