Three Principles or Laws govern the structure of the Wyckoff Methodology. Procedurally there are a series of Tests that determine buying and selling decisions. There are nine of these Tests, or thresholds, to be passed for making a buying decision, or a selling decision. The Nine Buying Tests and the Nine Selling Tests all adhere to the overarching Wyckoff Laws. The tools Wyckoffians use to evaluate the Three Laws and the Nine Tests are vertical barcharts and point and figure charts.