How to grasp the tote board odds and odds drift fluctuations is to see that to make money in racing requires predicting what the odds will be on the tote before the race is over. This is to let you predict before-hand if money can be made before wagering. This is an aspect of profitcapping since this deals with money. To do this takes a statistical orientation to money in finding the most probable range of what each type of odds will most likely be.
Each odds (1/2, 2/5, 9/1, etc.) has a limit to how much larger or smaller it will get from zero minutes to post to the end of the race. Your job as a player is to find out how much larger or smaller this range will be. Because small odds can get larger and large odds can get smaller. But you must learn how to figure out how much larger or smaller. If the odds of say: 2/1 at zero minutes to post to the race’s end may change from 2/1 to 6/2 or 3/1 or from 2/1 to 1/1.
Is there a way to know the range of how much 2/1 will change? Yes. But it takes a large statistical sample of 2/1 odds. If 500 variables of 2/1 odds are taken at zero minutes to post to the race finish it will show the range of change and frequency of each change. This gives a sharper way of wagering. Tote board odds and drift is where drift means how much is the difference (if any) of the tote odds at zero minutes to post to the finishing of the race.
If the odds on the tote are 30/1 on a horse at zero minutes to post then how much will it have within the approximate 120-250 seconds? Whether larger or smaller in number size. As an example: lets say you have odds of 4/1 at zero minutes to post. You’ve taken a 500 variables sample of 4/1. You found that there’s a 15% chance that odds will get lower than 4/1 (3/1, 7/2, etc.) And there’s a limitation on how much larger or smaller 4/1 will get. To be able to predict what the odds will be at race’s end gives a strong advantage. Thus, it truly benefits the player to learn profitcapping or the money side of racing. This is partially how to grasp tote board odds and odds drift.

