Plot hole: If Bradley Cooper was able to "quintuple" his money every day in the market as he claims to have done, he would have been able to earn the $100k he borrowed from a loan shark within a few days, starting from $800. Alternatively, he is shown in one scene winning a pot in poker where he could presumably also make a large amount of "seed" money from gambling. There was no need to borrow such a small sum of money from a loan shark, making the entire sub-plot unnecessary.
Continuity mistake: When Eddie is eating breakfast and waiting for Van Loon, his hands and the food he is holding change position repeatedly between shots; sometimes his hands are down, sometimes they are holding up some food, and the amount of food he his holding changes too.
Factual error: During the shootout in the apartment, the blinded henchman fires his handgun 24 times before reloading (and about the same afterwards). Only small-calibre pistols would have that capacity, and the gun he's using isn't one (either to look at and from the bullet holes it causes).
Add timeJon Sandys
Continuity mistake: At the beginning of the movie, when the shot pans up the front of Eddie's building from street level, there is a balcony a few levels before we reach the top. When Eddie looks down from where he is standing and we see the front of the building from his point of view, the balcony is no longer there; the front of the building is now completely flat.