Check out the specs for these new trading algorithms offered by Goldman Sachs. They read suspiciously like computer virus descriptions, or guided weapons specs..!
I wonder if all financial trading will one day be simply subscribing to one algorithm or another. Some will inevitably be more popular than others, so there will be a market in algorithm pricing. Then, if Google Search is anything to go by, there will be systems developed to 'trick' the popular algorithms, requiring counter-measures... and so on.