That blue wash looked like it meant business as it actually happened.
The rally up to that point lasted 1 hour and 15 minutes with the DOW moving up by 150 points. Only 22 of the 75 1 minute candles closed red! In the last 15 minutes only 2 of the 15 1 minute candles closed red.
Holding short whilst screen watching that move would have been mental torture, even though there was no technical reason to support exiting the trade. (A few points higher and there would have been).