A market data firm, trying to figure out just what exactly it was that made the market flop around like the fish in the bottom of a boat earlier this year, have instead discovered distinct, and extremely weird, patterns in the stock market data. We're talking patterns it takes slicing the data into seconds to see, which describe trades which have no hope of succeeding. The modern equivalent of a numbers station? Skynet, signaling its minions? Two computers, farting away in the night? Who knows?