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The Upside/Downside Volume indicator demonstrates the distinction between advancing (up) and declining (down) volume on the New York Stock Exchange. The Upside/Downside Volume indicator demonstrates the net flow of volume into or out of the market providing short-term sell or purchase signals, based on zero line crossovers.
As well as other oscillators of that kind, the bigger the distance from the zero line is, the greater the chances of reversal. The oscillator is very sensitive: downward shifts are associated with selling, and upward with purchasing. The Upside/Downside Volume indicator can be a very effective trading instrument if used together with the TRIN or other technical indicators.