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Describing market breadth in terms of volume for the NYSE or the Nasdaq. This is a figure composed of the net sum of the amount of volume flowing into up stocks minus the amount of volume flowing into down stocks at any given moment in each of the two respective markets. Often the advance decline line is also referred to as “breadth”, but ShadowTrader differentiates between the two by using two separate terms. Generally, the Breadth is more important than the advance decline line.