confusion i guess.
I was saying e.g. someone buys 50,000 shares. The trade executions for that 50,000 buy may show 10 individual 5,000 partial share fills. At least that's what i sometimes see on Last Sale in Ameritrade. I'll compare a bunch of small trade executions in Ameritrade to a large single trade @ the same time in another website, and they'll be equal.