There are two types of trading markets; bull markets and bears markets. Both of this trading markets are characterized by the same feature: prices traverse great distances in a short period of time. The move is violent and is in one direction. This one-directional moves may or may not be move according to high volumes. For a better technical grasp of the volume factor in this stage of market better to see how volume behaves in the various types of downmoves and upmoves.
Bull vs. Bear markets:
There are many subtle differences between the behavior of bull trends and bear trends which would require too much detail to explain here. However, one remarkable distinction is that bear market trends are fast and brief and cover great distances in a short period of time. True bull markets, however, are slow and long-drawn our affaires, covering great price distances and taking much more time to develop. Uptrends that are relatively quick and brief and also cover great distances in a short period of time are not true bull markets, but rather reactions in bear markets. Awareness of this fact should help the trader in determining whether or not an upmove is a true bull market of rather a reaction in a bear market.