Quote from atticus:
Triangular-arb is a loser for those of you considering it. Adding the edge-loss on binaries is just silly. Which do you think involves more microstructure loss? Nailing the correlation or trading friggin binaries?
it can be done though. there are lots of professional firms that spend loads of money for options contracts to make a very small spread. They just trade A LOT to compensate for them spending a shit load of $ to make a few cents.