Jim Cramer's favorite market indicator signals stocks way overbought

Cramer says he should be feeling pretty sanguine about this market. But there's one thing he's worried about--the Standard & Poor's proprietary short-range oscillator, which he has subscribed to for 30 years because it offers the best read on whether the market's overbought or oversold. And right now the oscillator says be careful.
Thu, Sep 12 20197:02 PM EDT