It seems the 100WMA is more important than the 50 or 200WMA for the SPX. Since 2010, the 100WMA has been a strong support line, therefore I would imagine the next decline to be no different. 1400 is line in the sand which also is 23.6% fib retracement of 2000 high (secular bear theory). Strong break/reversal from there is telling. RSI support trendline is also quite clear.