The north node is where the moon crosses from south of the ecliptic to north of the ecliptic. The trend in business volume has been found to correspond with the cycle of the North Node which has a cycle length of 18.6 years. The North Node moves backwards through the signs in relation to the other planets. The high point of business volume is reached when the North Node transits through Leo. The low point of business volume occurs when the North Node transits through Aquarius. The last transit of the North Node through Aquarius was Dec 2007 through August 2009.