Forex technical analysis: GBPUSD moves back into the “Red Box”, and look what happened

Lots of people exit at the same time or one big seller?  Who knows, but the level was important….
The price plunges 100 pips in 12 seconds. Wow.  What triggered it? Technically we moved back into the Red Box.  Have been talking about the Red Box all day (all week/ last week).  Everyone can see it….