In modern markets, the S&P 500 has never lost ground over the following year when advancing volume was 87% or more of total volume for 2 out of 3 days coming off a 52-week low. It has a perfect track record. **
* Of course, this doesn't preclude short-term losses. Of course, I can't predict the future. Of course, this time is different. Of course, it would be great to have a larger sample size. ** Beware anything that seems "perfect."