The Paulick Derby Index is similar to a top 25 poll for college sports. It should be a table, but it loses the formatting when I copy and paste it. The first number is the horse's rank, then the horses name, then the number in () is the number of first place votes. The next number is the total number of points, which is how they are ranked, and the final number is that horse's ranking last week.
The idea of it is to use a similar methodology to college sports polling to create a good general picture of what horses are likely to do well in the Derby.