Read the post between you and Ronbo on the 7-10 rules. It interested me, so I pulled a Gann book off the shelf and skimmed thru it. He has many rules and observations. I found this one, and was wondering, if you had an opinion on it as it appears to be related to the 7-10 rule. I have watched coffee for a little while and thought it was going to breakdown, but it came roaring back. Had a loosing trade in it, but am still watching once I saw this about the 7-10 rules. If you also think it applies to the 14 day or more rule, chime in and let me know. Including a daily chart of coffee from this site. At the present time its up again. However, who knows how much it can reverse as it is looking pretty strong.
From How To Make Profits in Commodities by W.D. Gann 1951 Revised Up-To-Date Edition page 318.
In a fast advancing market when prices have not broken the lows of a previous day for a period of 7 to 10 days or a period of 14 days or more, the first day that prices break the low of a previous day and close near the low of the day, it is a REVERSE SIGNAL DAY, regardless of whether it is a GAP or a LIMIT DAY, but it is more important for a change in trend when it is a GAP DAY and a LIMIT DAY.