A method for use by buyers and sellers in the execution of trades. The
price of each executed trade within the system is logged. Next, a trend
line is derived from the logged trades. The trading fee for a particular
trade is determined based on the difference between the trade's price and
the trend line as well as the size of the trade. This fee is imposed upon
the buyer if the price of the trade is below the trend line, or imposed
upon the seller if the price of the trade is above the trend line. The
market markers in each item are evaluated according to how narrow their
spreads were at the time of each transaction, and receive periodic bonuses
based on these evaluations. A "crisis fee" is imposed on trades in the
system when particularly measured qualities exceed normal bounds.
