In these FAQs we have considered Underscored Fields; Ranked Fields are very similar.
An Underscored Field is the highest rated field value in that race. For example if in a race one of the horses had a Cls of 20.0 and it was higher than any other horses' Cls rating then that would be underscored.
A Ranked Field is very similar. Rather than identifying the best field rating a ranked value would be one of the best three.
Therefore, if a system required a Rank TrForm then it would look for a horse with one of the three best TrForm ratings in that race. So, rather than the best one we're talking about the best three.
Ranked values are marked in the Ratings by being emboldened.