I can see Dick Lexic and DJ yesterday made reference to the Square of Nine.
Approx three months ago I wrote a program to display horizontal lines (support/resistance levels) and vertical lines (timing for turning points) on my charts calculated using the square of nine.
I found on the FTSE cash one hour chart the horizontal lines did appear to work as support/resistance levels providing some guidance to how the market might move. The vertical timing lines I found no help at all apart from one isolated occurrence when over a two day period on a 30 min chart the intersection of the horizontal and vertical lines plus a 1:1 (45 degree) Gann fan line gave the exact level and time of market swings on five consecutive occasions. Subsequently at different times I tried to reproduce this uncanny event using 10,20,
30, 60, 120 min time-frames plus different Gann fan angles , but never could, a one off freaky event?
Also for anyone interested playing with Gann angles on a day trading basis I came across this tool (I think you can download it or just bookmark the web page) at
Intraday trading software using gann angle trend line