how does it happen, page-7

I have completed many trades over time and most often using popular online brokers so cross trades would potentially be quite common. I have never ever been down the queue and had my order lifted ahead of others as a cross trade. And frankly I wouldn't want that to happen.

The way I understand it, if there is a buyer at the top of the queue using a particular broker and someone from the same broker decides to sell at market this can go through as a cross trade. Otherwise the only way a cross trade can occur is if one is organised off-market. Being able to shift the order of buy and sell orders that are on-market in a queue would comprmise the system I would have thought.