The girl (elder) is born in Capricorn ascendant and third sign from Capricorn is Pisces. Her brother is born in Scorpio ascendant and how the relationship between these two horoscopes can be established?The birth ascendant of the brother is Scorpio and it is in perfect trine to Pisces, which is the 3rd house in sisters horoscope. Let us see this in other way. From the horoscope of boy, 11th house indicates elder sister. His 11th house is Virgo and the birth ascendant of sister is Capricorn and it is perfectly in trine with Virgo.Some other similar patterns can also be seen in the horoscopes of siblings. In this example, Jupiter is placed in 5th house and Venus in 7th in both the horoscopes. These two combinations are not accidental and so many secrets of their previous birth can be revealed from these combinations. This point will be discussed later.In a few cases, the 3rd sign of the native or its trine might be the Moon sign of the sibling. These combinations in a similar way can be read from Moon sign also in a few cases.