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Methodology

The Norton Index was created by Thomas Norton in 2015 to prove a new way to access horse racing data without adverts or paywalls. Since then we have updated providers and added different data analysis approaches in order to provide the most complete service possible. Due to the amount of data that we display on each page, a desktop/laptop is best used to view the site. However we will be working on a dedicated mobile site at some point.

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Race Pages

Each day we automatically provide a page for each race at each meeting, These can be found in the drop down menus on the top of each page. The abbreviations that we use are explained on the table below

Any information used is done so at your own risk,

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AbbreviationMethodologyOn hover text
No.Race card number and if its applicable the horses stall number will be found in brackets
ORBHA Official Rating
NINorton Index, takes the AT (Average Time) and adds to it the jockeys performance, trainers preformance, draw bias and form to provide one value. These Values are based on the difference from the standerd time across all past resolts. A value is also only applied if it falls 5 second above or below the standerd, so that outliers are excluded. A lower number shows a horse is expected to complete the race more quickly and so WE BELIEVE may have a higher chance to win the race. In addition jockeys and trainers must have 100 races in the database for their form to be considered. The lowest non zero expected time is the horse we publicly tip on the website and on twitter.
MINFastest time over race distance
MAXSlowest time over race distance
DSLRNumber of day's since the horses last ranDays since last run
DNFThe percentage of races the horse has failed to finish
GTThe Average time that the horse has taken for the race distance when only considering past results on the same going A List of the times for the horse past runs when on the same going
ARDThe Average distance that the horse has run in furlongs A List of the distances for the horse past runs
APThe Average position that the horse has achieved A List of the positions for the horse past runs
ATThe Average time that a horse takes to run todays distance taking into previous times across all goingsA List of the times of horse past runs adjusting them to todays distance. This is done so that a horse who ran a shorter distance in previous races isn't given a much better time
ARSThe Average percentage of each track and distance standard times (That can be found on the Track Bias Page) That the horse has achievedA List of the horses decimal ST percentage times that were used to make the average
ADBThe Average Distance that a horse has been beaten in their past formA List of the horses distance beaten that were used to make the average
Maximum, Minimum and Average Adjusted Times GraphA graph showing the horses average time (AT) indicated by a horizontal line along with the horses best and worst times indicated by the extension in vertical lines. Shorter vertical lines may be an indication of more consistent performance
Adjusted Time ChartA graph showing the horses average time (AT) for each of their previous runs. Horses with lines off the graph have no time for that race for example where they were pulled up. You may deselect horses by clicking on them in the keyWhen hovering on a data point the graph will display the horses name along with the time that they ran
Percent of Standard Times ChartA graph showing the horses Standard Times (ST) for each of their previous runs. The Standard Times that we uses are updated daily and can be found on the " Track Biases " page. Horses with lines off the graph have no time for that race for example where they were pulled up. You may deselect horses by clicking on them in the keyWhen hovering on a data point the graph will display the horses name along with the ST that they achieved for that run