If you are familiar with the max pain theory, one of the best sites out there for SPY and AAPL is found here: http://aaplpain.com/?page_id=32. I forget to check this on a regular basis, but had I done so today, I would have known that when AAPL got close to $660, most likely it wasn't going to go lower and would have been a safe bet to buy some calls.
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