The S&P 500's rally of the last two sessions saw both days register 90% of stocks advancing, according to Jason Goepfert at SentimenTrader.
That's very good bullish breadth. But what's likely to come next?
Goepfert has run the numbers for the 17 tines this has happened before and created the table below.
Over the next week it was all but a toss-up as to whether the market gained or fell. Over 2 weeks it was positive 59% of the time, over a month it was up 71% and 2 months later on every occasion the market was higher.