What happened
Written from the data, not opinion.
Positioning puts the upper wall at 172.50 and the lower wall at 161.00.
The ask wall at 168.51 held at 00:23 UTC: about 626 NVDA traded into it and price turned 0.59 USD away.
At 02:01 UTC a 3,084 NVDA bid wall at 167.83 was pulled before price reached it.