I've never trusted the system that color-codes goods by profit. I generally get around the map a lot, and have a good idea of the price ranges for many goods, and I make buy/sell trades based on that.
Seldom have I looked for an actual example to mistrust these markings, but I have one here.
Note the "Salt" entry for both sides. They're both marked green, supposedly indicating an advantageous price... but buy/sell are only 3 denars apart! That spread is too tiny for both of them to be good deals! (Incidentally, in this actual game, I won't sell salt at under 30 denars, and it's easy to find places where I can sell as high as 56.)
Seldom have I looked for an actual example to mistrust these markings, but I have one here.
Note the "Salt" entry for both sides. They're both marked green, supposedly indicating an advantageous price... but buy/sell are only 3 denars apart! That spread is too tiny for both of them to be good deals! (Incidentally, in this actual game, I won't sell salt at under 30 denars, and it's easy to find places where I can sell as high as 56.)