retrograde Mercury rules 7th and 10th house is in 9th house in Leo

As a Jyotish astrologer, I can interpret the placement of Retrograde Mercury in the 9th house of Leo for you.

Firstly, Retrograde Mercury indicates that the native may have communication issues or may struggle with expressing themselves effectively. They may feel impeded in their ability to communicate their thoughts and ideas, leading to misunderstandings and miscommunications. Additionally, the retrograde nature of Mercury suggests that this problem may be rooted in past life experiences, or may be deeply ingrained in the native's psyche.

Moving onto the placement of Mercury in the 9th house, this is a very auspicious placement for this planet. The 9th house is associated with higher knowledge, wisdom, spirituality, and philosophy. Leo is a sign of creativity, leadership, and self-expression. Hence, this placement indicates that the native may have natural inclinations towards these fields and may excel in teaching, writing or spiritual practices.

However, being retrograde, Mercury may cause some confusion and indecisiveness for the native. Additionally, the influence of Leo can make them stubborn or arrogant in their beliefs, leading to a lack of receptivity towards other people's ideas.

Overall, this placement can provide great opportunities for spiritual growth and development of higher knowledge, but the native needs to work on their communication skills and be open to learning from others.