Forget Wall Street — one of the busiest trading floors on the planet is the fabled futures and options market at Chicago’s Board of Trade, the subject of director James Allen Smith’s interesting but unfocused documentary.

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Smith gets a lot of current and former traders to open up with war stories about their biggest wins and losses and describe the rush they get from taking risks that amount to high-stakes gambling.

But this relatively short doc is more than halfway over before it gets around to addressing its stated theme: how computer trading has thinned out the crowd of sharp-elbowed traders by some 90 percent since 1997.

“Floored” seems to have been largely completed before the crash of 2008, which is addressed in an unsatisfying coda.