The sq9 was purported to be an important piece of Gann's methodology although he never really discussed how he used it in any of his material. Certainly the above provides quite a different way of looking at intraday price movement.
Yes, in Gann's written course material he never actually gave implicit instructions how to use his squares of price and time charts. One thing we know for sure with these charts: price (numbers) spiral out into separate stacked squares with specific dates circling these Master Time & Price charts. The square of 9 chart is based squaring odd numbered squares---note the first square is the number 1, the second square ends in the number 9 (square of 3), the 3rd square ends in the number 25 (the square of 5). All the squares of odd numbers end on the same diagonal angle with the date Feb 4th and 180 the date of Aug 4th. There are 16 dates on Square of 9 Chart, in other words the whole year beginning from the Spring Equinox is divided by 16 to get 16 separate dates.
Now, lets look at the square of four chart. The first square on this Master Time & Price chart ends in the number 4 (the square of 2), the second square ends in the number 16 (the square of 4). All the even numbered squares end on the same angle going from two dates---the Spring Equinox to the Autumn Equinox, with 24 separate dates on the Square of 4 chart. Never was any of this discussed in the Gann course material! I had to figure all of this myself when closely looking at these two Master & Time charts. Since the Square of 4 Chart and its even numbered squares fell on the natural law cycle of the Spring & Autumn Equinoxes, I chose this chart to seriously study with various markets. Since I started my trading objectives with two markets, the gold and soybean markets, I spent long hours in the Library gathering DAILY price history in these two markets (10 years of daily price history). Then, at nights I would study my Library Price data and I discovered a remarkable fact: Major tops and bottoms in the the soybean and gold markets were pivoting off the exact dates on the Square of 4 charts. I then immediately ordered more history of daily price charts and discovered some markets were pivoting with important tops and bottoms off the Square of 4 chart and the square of 9 chart----frigging amazing. This proved to me Gann had discovered there was a natural seasonal law with time & price governing all markets. If I was a day trader, I first would want to know if the market I was day trading was vibrating to the odd square Master Chart (9) or the even square Master Chart (4), paying very close attention to their exact dates for important support or residence price levels.
As far as McWhirter's timed NYSE chart in this thread, I strongly suspect she got this exact time from a member of the NYSE exchange. Members have to pay a large $ fee to become a member and are probably the only one's who have access to historical data which would have recorded the TIME of the first trade on the NYSE Exchange. I suspect Gann had the times for first trades in several markets! These exact first
timed historical trades would become invaluable to a serious astrologer---no different from an AA rated timed birth chart. Gann was an astrologer---I have seen in Gann's hand writing from the Jones material who bought out Gann/Lambert publishing company---astrological symbols used on price trend lines when trends reversed. In other words, Gann was tracking Planetary aspects when a major price trend in a specific market would time a major reversal in a specific market. But Gann never discussed astrology language in any of his written course material, and Billy Jones had all of Gann's course material. When I realized with the Gann material TIME was governing the markets, is when I decided to take up a serious study of Astrology as applied to my AA timed birth chart. Indeed, "Timing is Everything."