It's not just the Harami involved in a reversal of course. The $SPX also has good support at 1350, and a solid 4 month uptrend behind it. I think all 3 things combined, are probably saying "more upside to come". Then again, maybe I'm just talking my book - being 100% long at the moment!
I see even number support at 620. Support range 621-617. Next even number support below that at 600. It keeps pushing down on 621. We'll see what happens.