Randy McKay -- There are few futures traders who have gone from a starting account of several thousand dollars to double-digit million-dollar gains. Those who have kept their winnings are even fewer. The start of McKay's trading career coincided with the birth of currency futures trading. Over his entire trading career, McKay has been profitable for his own account in eighteen out of twenty years. A conservative estimate would place his cumulative earnings in the tens of millions. (Source New M…