What Is Left-Aligned WR Target Rate Allowed?
Left-aligned WR target rate allowed is the percentage of routes run against a defense on the OFFENSE's left -- the defense's own right side of the field -- that ended with a pass thrown that way. Dividing by routes defended from that side rather than by total attempts turns a volume number into a signal: it answers whether quarterbacks choose that side when it is available, independent of how often the defense was throwing-down overall. A high rate is an invitation being accepted. It uses the same definition as Target Rate on Cornerback+ and as Left-Aligned Target Rate on the receiver side, so all three read against each other directly.

