It has long been the custom in mundane astrology to consider maps drawn for the time of the entry of the Sun into the cardinal signs: Aries,Cancer,Libra and Capricorn. Of these, the Aries Ingress was by tradition considered the most important and possibly to be thought of as “the map of the year”. Led by Carter astrologers have begun to consider the Capricorn as the prime ingress.
It was Carter who suggested that if the sidereal zodiac were valid, maps for the entry of the Sun into the constellations of Aries, Cancer, Libra and Capricorn would be of importance. This suggestion was followed up by Garth Allen, who in an extensive statistical investigation found that the sidereal ingresses were not only valid but of the highest significance. This opinion has been fully confirmed by other investigators in recent years. Garth eventually arrived at the conclusion that the Capricorn Sidereal Ingress was of primary importance followed in rank by that of Cancer; Aries and Libra, whilst having some significance, could be considered of lesser importance. - Primer of Sidereal Astrology; Cyril Fagan, Roy C. Firebrace
In my post  on a possible market correction, I wrote:
“The effect of the New Moon lasts the entire lunar month so that Bill Blain may be right. The big crash may be just around the corner!!”
It is important to remember that astrology is about “wheels within wheels”. Events happen when a big wheel and a smaller wheel align as for example, the hour hand and minute hand in a clock. A clock does not strike the hour unless the two hands align. Much in the same way we have an hour hand (the cardinal ingresses of the Sun) and the minute hand (lunations and transits).
A much forgotten indicator in mundane astrology is the map for the entry of the Sun into the constellations of Aries, Cancer, Libra and Capricorn. Shown here is the chart for Sun’s entry into sidereal Libra drawn for New York. Notice the Sun opposite Uranus aligned with the meridian resonates with the New Moon which fell on the same axis a day later. And of course both these trigger the NYSE map.
So in essence the Libra ingress chart which holds for a quarter of a year has been primed by the New Moon and this effect could last for about a month. But does that mean that this is the only trigger in the Libra quarter? Well no. Here are the other triggers in early November and December.
Libra Ingress of The Sun - Solar Return
18 Oct 2017, 0:31:31 am (±0 secs), EDT +4:00
New York NY, 40°N42'51'', 074°W00'23''
Geocentric Tropical Zodiac
Placidus Houses, True Node
P1 (H) Asp P2 (H) EXL Type Date Pos1 Pos2
Ven (4) Cnj Sun (4) (X) Tr-Re 3 Nov 2017 24°Li59' D 24°Li59' D
Ven (4) Opp Ura (10) (X) Tr-Re 4 Nov 2017 26°Li35' D 26°Ar35' R
Mar (4) Cnj Sun (4) (X) Tr-Re 1 Dec 2017 24°Li59' D 24°Li59' D
Ura (10) Opp Sun (4) (X) Tr-Re 1 Dec 2017 24°Ar59' R 24°Li59' D
Mar (4) Opp Ura (10) (X) Tr-Re 3 Dec 2017 26°Li35' D 26°Ar35' R
 Is a market correction around the corner? https://goo.gl/ZmLQkD
PS: The precessed solar return of the NYSE chart progressed to October 23/24, 2017 gives another likely date for the market correction. Here Jupiter is conjunct stars of Corvus which Diana Rosenberg links to financial collapses.