Wayne, thanks a lot for your response and Sugarman link. I have read a fair amount about Gann and the 1x1 angle, and to me it always seemed somewhat arbitrary. What is 1 vertical unit depends on how one draws the graph. Same for what is 1 horizontal unit. As long as you are dealing with a standard commodity and standard timescale (e.g., Sugarman's daily SPX charts) these scales are understood (1 dollar vertical, and 1 day horizontal), and the 1x1 angle is uniquely defined.

I believe Gann's writings concerned themselves primarily with stock prices (1 price unit = 1 dollar) and daily charts (1 time unit = 1 day).

But when you want to extend the 1x1 idea to commodities, or use weekly or monthly charts, the situation becomes somewhat muddy.

Anyway, I need to spend more time on this. You have helped. Thanks.