Algorithmic Trading can be a complex subject. Keep your knowledge current with this glossary of key concepts, terminology, and technical indicators.
A price zone in which a stock finds resistance and begins to trade downward. In technical analysis, that support occurs not at a finite point, but in a zone. The "density" of the zone of resistance (how far up the price can move through it), depends on the volume of trading as the price approaches and enters the zone. The higher the volume of trading in the zone of resistance, the lower the point at which the actual resistance will most likely occur.