Ring another broker. You clearly have no idea how institutional...

Ring another broker.

You clearly have no idea how institutional dealing desks work in the 21st Century.

Institutions give brokers hundreds of orders each morning.

Of those, a maximum of 10% (maybe) are able to be automatically crossed at prices demanded by the institutional dealing sheets.

So you are saying that the institutional dealers must then ring around with 90% of the trades still incomplete to see if Broker B can fare any better?

And don't forget, you've got hundreds of institutions - domestic and international - placing orders every single day; sometimes several times a day.

And you reckon all of those orders can be successfully executed manually?

That used to happen in the 1970s; it was called the Open Outcry System.

Sounds like you want to bring back that way of doing things, along with the associated criminal activities such as front-running and abuse of market making information.