SPY is WAY below the 200 ma, no need to wait till the end of the month.
System 2 : AK Trend ID
The indicator called the TOP last Friday.
System 3 : % of S&P 100 above their 200 MA
For those of you who follow this system , you were out of the market since March ,2015
Conclusion : This is the top folks , and i'm all in cash
Cheers and good luck