who knows about capping, page-25

in terms of price caping someone sitting with millions of shares that wants to pick some up might put an order up on a fairly stable stock above the usual price trading, then instruct another broker to place a buy order a few clicks down if u discourage buyers by capping and then wait for the bored frustrated and nervous nellie investors to ditch u can pick some up.

This is all theroy i assume it goes on at least indirectly moreso on illquid stocks.

Autobot trades designed to catch out stop losses are also common and legal to use