What happened
Written from the data, not opinion.
Positioning puts the upper wall at 30,900.0 and the lower wall at 28,200.0.
The bid wall at 28,436.5 held at 01:44 UTC: about 10 US100 traded into it and price turned 25.5 USD away.
At 03:09 UTC a 58 US100 bid wall at 28,360.7 was pulled before price reached it.