Tomi Kilgore at Marketwatch.com posted an article and a chart of the SP500 that goes back to February 2016. The triangle wedge pattern seen in the inset chart is often considered an ominous chart pattern. If and when price breaks below the lower trend line, weakness could enter the market and a significant drop could occur back down to the next chart support level.
It’s a classic pattern that ‘bears’ watching.
You can read his full article here..