Dark pools seek retail customer order

Among the most exciting technology-driven trading developments of the last few years has been the rise of dark pools. Institutions clearly want electronic execution in venues that allow them to trade anonymously and with as few market ripples as possible. Increasingly, as the dark pool competition heats up, more firms are seeking additional liquidity from the retail side. Large broker dealers, such as Citigroup, are leading this wave. For example, Citi Match allows big clients' internal algorithms to match trades against orders from Smith Barney and other retail broker-dealers. All this continues a recent trend in which technology once available only to the big boys has found its way to the little guys.  

For more:
- here's an article from Traders Magazine