Lower volume on the head than the left shoulder, then lower volume on the right shoulder than the head. Neckline slanted up, though not certain yet. Need another 1-3 12H candles to confirm, and seeing a candle close below the neckline would be proof in the pudding. Right now its still possible we see a rally and a continuation of the recent uptrend (would want to see a clear break above the left shoulder to mark this), and even if this is a head and shoulder we could see a return to ~19k (height of left shoulder) before the eventual drop.
Too early to tell just yet, so I'm personally not selling, but will be watching closely over the next 24-36 hours.