For those who have never seen this movie, regardless if you are involved in stock trading, it is a must watch on so many levels, be it general business, corporate leadership, department interactions, skullduggery, familial, as well as personal backstabbing, the list goes on. It is absolutely loaded with a plethora of take-aways of the real-life-lesson variety. I say this because I have been involved around, in, as well as been at the receiving end of the proverbial "poisoned dagger." Not on Wall Street, but within other fields.
I can tell you with point-blank certainty that many of the situations and scenarios contained, or played out in that film, are applicable (as well as happen in-kind everywhere) to getting a condensed lesson in what happens in real-life at the top of the game of business. i.e., When you're playing for, "all the marbles" as they say.
Margin Call was nominated for an Oscar®, in my view, not only should they have won, but swept them. But that's just me.