Ratio for the CurrentY estimates for the past 4 weeks of the following:

(#UpRev - #DnRev) / #Estimates

#UpRev = Total number of upward revisions for this industry
#DnRev = Total number of upward revisions for this industry
#Estimates = Total number of estimates this industry (not the same as #analysts)

A value greater that 0 indicates higher number of upward revisions vs downward revisions.