To suggest, a few tweaks. Instead of "Crazy Daytrader" who afterall really could never accomplish it how about ...super computer that learns and taps into Googles data mining profiles of its competition and learns their tendencies and plays them. Add some strategy and tactics from current machine trading and\ the whole scenario might actually be fictionally adaptable.
Isn't this the exact plot of "The Taking of Pelham One Two Three"? http://en.wikipedia.org/wiki/The_Taking_of_Pelham_123_(2009_film)
I think you're on to something. The only way we'll get the white demograohic to watch this movie will be to have an all black cast. Need booty, bling, some glocks and a good sound track. We'll shoot the whole movie underwater (never been done before in a black genre) everyone is going down attacked by the vampire squid. I think we should shoot on location in South America (yuk yuk.... hi guy just giving you a heads up).