A custom oscillator created from US common stock data recently hit historic oversold levels on 20160513 reaching a low of -115. I scanned the database for instances when the US Common Stocks up 4%+ - Stocks down 4%+ Oscillator crossed below -100.
A 78% edge exists over a 1 month time period a solid edge versus random odds posting an average gain of 4.82% and calling for an S&P500 around 2132.17. The size of the data set is from 2007 to present. Despite the relatively small sample size, this edge has endured the financial meltdown of 08 and remains fairly robust with a 78% win rate.
Methodology:
Days in sample:2328
US Common Stocks up 4%+ - Stocks down 4%+ Oscillator: <-100
Number of occurrences since 2007: 42
Dataset Inception: 20070216
Filter Duplicate Days: 15 day filter