Interesting chart from BofA, republished in Zerohedge this morning:

USDJPY has shot up on continuing dismal economic news out of Japan, reaching the .886 retracement overnight of the drop from 105.43.

This coincides with a smaller scale potential reversal for SPX.

Note that SPX reached the white .886 at the close Friday — also suggesting a reversal.  Keep an eye on both as the market opens, and particularly as PMI and construction spending come out at 10am.