An excellent movie about that endangered animal, the pit trader! It follows a group of Chicago pit traders and the effects of automation on their lives.
see http://flooredthemovie.com for more details.
Other classic trading movies that are a must see are:
Trading places (Clarence Beeks’ classic insider long position at the end of the film is brilliant!)
Glengarry Glen Ross
(This isn’t an exhaustive list and I will update it as more come to mind)
Any suggestions message me at @baryquinn.