Well when you see them like that after being obviously held up by MM's near that trade price for hours, they were either a.short and covering. or b.Filling a very large AON order.
Either way it's a plus for SH's..if it was a cover, then the MM is ready to move up from there, which is what happened after that fill.
If it's a new SH it's good for the same reason, and the obvious, a hand that strong will bring a lot of support with it.
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