Note that the "price difference" in 10 minutes is $30, but this does not mean that "somebody poured about $300 million into Bitcoins".
One person "poured" exactly $130 into bitcoins. That's all.
you're right if there is only one person who spent $130, it means "somebody poured $130 into Bitcoins"
but if we have all those bitcoins owners in the market, price would never stay at $130 after someone filled that order. All those bitcoins owners immediately sell all their coins as new price is more than they can hold. And in case if eventually price stay at 130 that would mean that all those buyers "poured about $300 million into Bitcoins