Mercury rules 9th and 12th house is in 4th house in Capricorn

Mercury in the 4th house in Capricorn sign can indicate a person who is very intelligent and capable of deep analytical thought. They may also have a strong interest in history, tradition, and lineage, and may have a keen sense of responsibility towards their family and home.

This placement of Mercury can make the individual highly skilled at communication and negotiation. They are able to think logically and rationally, and can often convince others with their arguments. They may also excel in fields such as law, business, and politics.

However, this placement may also make the person prone to being overly critical and judgmental of themselves and others. They may struggle with expressing their emotions and connecting with others on an emotional level. It is important for them to develop a balanced approach to their communication style and work on building meaningful relationships.