The trading discipline of refusing to take a trade unless its setup can be articulated in a single sentence as a specific sequence of VSA signals. If you cannot name the background, the primary signal, and the trigger, the trade should not be taken. The discipline protects the practitioner from impulsive entries during the long sideways periods (roughly 70% of market time) when no genuine setup exists, and reflects VSA's broader principle that the trader's edge lies in patience—waiting for the market to come to him on his terms, not chasing it on its terms.