The Stochastic Oscillator measures how much a price tends to close
in the upper or lower areas of its trading range. Stochastic %D is a
smoothed version of the Stochastic %K. Stochastic D% is used as a
signal line for Stochastic K%. A buy is triggered when Stochastic K%
crosses above Stochastic D% from a level typically below 30. A sell if
triggered when Stochastic K% crosses below Stochastic D% from
typically above 70.