When there’s a correction in Sep-Oct, Jan follows:

Sep-Oct 2013 followed by Jan-Feb 2014 (small due to QE)

Sep-Oct 2014 followed by Jan 2015 (larger but Fed rate 0)

Aug 2015 followed by Jan -Feb 2016 (biggest correction yet as Fed rate rose in Dec, volatility increases as Fed rate rises provided Oil is below the line)

Sep-Oct 2016 NO correction and then Jan 2017 NO correction as oil above the 40wkma

Next: Sep-Oct 2017 followed by Jan-Feb 2018 (big also due to Fed rate rises)