Charts tell us that every move is known in advance. Insider trading is just too easy. Big brokers would watch their wealthy clients' trading activity like hawks, especially politicians and their families. They then notify their friends & family that eg. Pelosi just bought a load of Amazon calls after a meeting with Jessy and pretty soon there's a footprint indicating interest. If the big funds are not in on it, then they soon sniff out such activity and join in. So even one person can create a snowball effect.
I haven't been following the Powell story, but yeh, anything's possible.
Of course there's sophisticated hackers too, who probably have a wire on many of the fortune 500 companies. When you can download the minutes of the board meeting before everyone else, you have a major edge.
