Jim Cramer today angrily called on Federal Reserve Chairman Ben Bernanke to lower interest rates, saying he "has no idea how bad it is out there" in the nation's credit markets.

In his "Stop Trading" segment on Street Signs Friday, Cramer said the nation's central bank is "asleep" and should immediately "relieve the pressure" on financial firms and the nation's home owners who are facing big increases in their mortgage payments as 'teaser' rates expire. Many thousands will "lose their homes," he warned. "This is not the time to be complacent."