> (I thought that this is what you call brokers with heavy flow that could cross much of their traffic internally without going to the exchange.) What you desc

> (I thought that this is what you call brokers with heavy flow that could cross much of their traffic internally without going to the exchange.) What you describe here sounds like dark pools[1]. [1] http://en.wikipedia.org/wiki/Dark_pools_of_liquidity http://en.wikipedia.org/wiki/Dark_pools_of_liquidity