trove. Perhaps breaking the day up into finer segments might enable theCan somebody take a screenshot of the page where it was mentioned?
That would end the discussion.
team to dissect intraday pricing information and unearth new, undetected
patterns. Laufer began splitting the day in half, then into quarters,
eventually deciding five-minute bars were the ideal way to carve things up.
Crucially, Straus now had access to improved computer-processing power,
making it easier for Laufer to compare small slices of historic data. Did the
188th five-minute bar in the cocoa-futures market regularly fall on days
investors got nervous, while bar 199 usually rebounded? Perhaps bar 50 in
the gold market saw strong buying on days investors worried about inflation
but bar 63 often showed weakness?
Laufer’s five-minute bars gave the team the ability to identify new
trends, oddities, and other phenomena, or, in their parlance, nonrandom
trading effects. Straus and others conducted tests to ensure they hadn’t
mined so deeply into their data that they had arrived at bogus trading
strategies, but many of the new signals seemed to hold up.
It was as if the Medallion team had donned glasses for the first time,
seeing the market anew. One early discovery: Certain trading bands from
Friday morning’s action had the uncanny ability to predict bands later that
same afternoon, nearer to the close of trading. Laufer’s work also showed
that, if markets moved higher late in a day, it often paid to buy futures....page 135

