With the indexes showing some further moderate weakness, the VIX confirmed the market concerns and closed higher by around 9%, to close in the high 16s.
VIX'60min
VIX, daily
Summary
It looks like 18.50/19.00 is a valid target for Thursday, along with sp'1420.
However, that could easily be it for this down cycle from sp'1474, and my best guess is that it will be.
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Seeking an exit at sp'1420, with VIX 18/19, early Thursday