Time Extensions are used to specify vertical lines at date/time levels which are determined to be probable values of changes in trend based on the market’s previous date/time range and a third extension point. You have complete control over which percentages are used in the Time Extensions tool and the colours of each of the Time Extensions values. Common values are the Fibonacci sequence 38.2%, 50% and 61.8%. These are used as the default values in Optuma.
This is a companion discussion topic for the original entry at https://www.optuma.com/kb/optuma/tools/levels/time-extensions