Hi Archieus
There are all sorts of theories about gaps (some call windows) in TA. Some believe that when a share price gets close to a gap it is drawn like a month to a flame in order to close the gap. Whether or not it is a reversal trigger is subject to a lot of conjecture.
https://www.investopedia.com/articles/trading/05/playinggaps.asp
http://thepatternsite.com/gaps.html
