Yeah... https://www.elitetrader.com/et/threads/gapwatch.300893/#post-4298837 Holy crap, the original thread is 11 years old!: https://www.elitetrader.com/et/threads/pekelos-2nd-gap-rule.75045/page-2#post-1520607 Mind you, it is obviously not a 100% guarantee, (nothing is except death) but as close to it as anything in TA. I think I recall one case in the Trump rally when it didn't get filled on the same day.
So anyone who followed the advice, the overnight* max. downgap was 6 points and we just closed it. There you had it, a 6 pts pretty much guaranteed by yours truly... *It was only an hour ago, you didn't even have to wake up early...