From memory, I think it was HZR that I saw a similar thing happen to a couple of months ago. Stock did little for months, this one morning massive buyer depth came out of nowhere. Stock flew on open. Turned out a broker wrote a newsletter piece to his clients overnight and they all jumped onboard the next morning lol. (Think it was HZR)
It's either leaky ship, or the crew that's been accumulating for some time has got enough, and is ready to let this run.
BFC Price at posting:
44.0¢ Sentiment: Buy Disclosure: Held