Value-area high, abbreviated VAH, is the upper edge of a profile value area. The value area is commonly defined as roughly 70% of the profile TPOs or volume, though settings vary.
A test above VAH can be accepted, rejected, or become part of a new distribution. Rejection describes a reaction back toward value; it does not predict the next test.
Prior-day VAH, overnight VAH, and composite VAH are different references. Keep the source profile beside the label.