Agreed. Trying to decode trading patterns is futile. The brokerage houses represent many clients, who trade in and out. It's not one person.. i.e. It's not National the brokerage itself, they are just the representative of the clients doing the trades. RBC, TD, etc... All the same. They're just the broker. Futile to say "National did this, or TD did that" It's meaningless unless you know who is behind the respective trades, which you cannot possibly know.