Blood moons appear in groups, and seem to signal a change in directional pull for the markets. A failure to close above a weekly (monthly) pivot when a cycle ends suggest a bear market is upon us. SPX is currently under the monthly pivot moving out of a blood moon cycle. Next blood moon cycle is in 2018 when the market should have recovered or be starting its recovery.
100WEMA giving sentiment drive, failure to recapture above is usually bearish.
Each bear market (2000 & 2008) have reach at least S5 pivot of the peak.
I would also note that in 2011 we saw similar but the month ended above the pivot and bull market continued.