I would look again with a tighter lens, the island you speak of is exactly .01.
Closing low on 9/21 was 188.15
Subsequent low on 9/23 was 188.16
Still qualifies and worthy of watching as markets do not like a vacuum.
Noteworthy is the fact that NQ filled that island with the following trade:
on 9/21 close was 4849.50
on 9/23 NQ visited 4848.25 at 1:59pm effectively closing that island gap.
Basing a trade on regular hours without considering all trade can bite you.
Browse Symbol Stacks: QQQ: 13 sept26.PNG
13 sept26.PNG
...
Markets not liking uncertainty. 9/26/16