One of John W. Henry’s associates elaborated on the early days:
“Originally all of our testing was done mechanically with pencil and graph that turned into lotus spreadsheets, which was still used extensively in a lot of our day to day work. With the advent of some of these new modeling systems like system writer, day trader and some of the other things, we’ve been able to model some of our systems on these products. Mostly just to back test what we already knew, that trend following works.”
Had this same conversation this year with one of the interviewees for my book The Little Book of Trading. The difference? He was not talking of thirty years ago, but today!