Send to a Friend

"Stochastics"? "Bearish signal"? "Oversold"? What does this mean?
This is what it says today on a webpage pertaining to a stock I am watching because I hold some stock options:
=====
Stochastics
The Stochastic Oscillator is registering a bearish signal as the %K is below the %D. However, the oscillator has dropped below the critical value of 20 and <stock symbol> is now oversold. An oversold condition means that the recent downside momentum is not sustainable.
=====
This is part of an ad for a service that I guess helps you track your holdings. I’m not interested in the service. I just want to know: what does this statement mean? I have bolded all the terms I don’t understand.
Using Fluther
or