[link]

• David's concept

I have implemented the idea in a triangular fashion, though it is not clear it makes sense since there is only one sensible arbitrage direction. It makes sense if (when) changing relative prices is implemented. Still, it might make sense to implement a cross (4 commodities) as in the original currency version. I have implemented only 3 commodities to make it less threatening, though the 4 commodities version might actually look more symmetric and thus less threatening.

It probably makes little sense to the version in the form of a list as in the original David D. Friedman's version because it looks more threatening, though I didn't quite understand how it is supposed to work.

Progress:

• three commodities and two prices between
• on mouse hover, zoom arrow
• 4 commodities (as discussed above)
• trade other things: currencies, and other commodities
• change prices at each click, or after a few clicks (?)