Now available for free on Sit Down! website (download). The Fluctuating Market is an expansion for Rockwell. From now the Rockwell stock exchange will fluctuate (the resource values are fixed in the basic rules), which will allow the prices of resources from the mine to rise or fall, which will require players to buy and sell at just the right moment. Enough to challenge even the most hardcore gamers! This expansion includes a new Stock Exchange board and a new deck of 64 cards, both of which replace their counterparts in the base game.