Key to this is the idea of special numbers. Not lucky ones as 7, or unlucky 13, but ones which, from number crunching, are considered significant. We are not going into the realms of mysticism here, as those of you who are aficionados of Fibonacci retracements and projections will understand. Proportions of 0.61875 and 0.38125 are also special, but not magical (although some do believe 1.618 is divine). The Timespan Principle has three simple numbers: 9, 17 and 26 (remember, 9 and 26 are the days used for the moving averages) and are considered the most useful. • 9 is known as the ‘basic unit’ • 17 (9+9-1) is two of these basis units (the –1 is explained later) • 26 is three basic units (9+9+9-1), or one ‘term unit’. The next set of numbers are compound ones, arrived at through rough combinations of the first three. These are: • 33 (one term unit plus one basic unit), 26+9-1 • 42 (one term unit plus seventeen), 26+17-1 • 65 (is known as one ‘super big unit’, 33+33-1 • 76,