"That inside candle on the GU hourly 2nd hour after the gap was...

"That inside candle on the GU hourly 2nd hour after the gap was a classic setup."

Did you mean the bottom left (1) of this hourly chart - the doji? I would have missed that one, but I'll keep an eye out in future.

I put arrows for ideal entries on the hourly, IMO. (I'm a master of retrospective charting )

1) Doji after big move.
2) Resistance at S3.
3) Pin (almost).
4) Green > Doji > Red.
5) Pin on downtrend line established by 2 and 4.
6) Pin (almost) at bottom of channel.
7) Engulfing on downtrend line, but it failed.