[j_s]

Yes, it seems almost shady/misleading that this site doesn't include the Bitcoin/cryptocoin transaction fee and the exchange fees, which are all available publicly.

Exchange transaction volume should also be fairly readily accessible, but I'm not sure about that. This could be used to calcualate a probability of success to also take into consideration.

Even the various World of Warcraft auction house arbitrage add-ons take this type of stuff into account.

[jespern]

They can vary per user between exchanges, depending on how much volume they have, etc.

[j_s]

I do not disagree with your point. Is this a reason to leave it out?

It feels like talking to a stock broker / investment advisor who gives all the numbers while leaving out any mention of their cut. In this case the Token Spread site doesn't seem to get anything out of it, unless they somehow tie into exchange affiliate programs wherever they link them up.