In ala Igbo¹ (Igbo land), Chi is a person's representative in the spiritual realm. Chi is not Chukwu(God). A Chi is a person's own god or spirit, guiding him through life from conception to death.

When you see a person standing, he stands not alone, but alongside his Chi,
The Chi is the one that stands in judgement and gives the recount of a person's life lived on earth. It is said to be androgynous. Different person can have the same Chi but not at the same time, meaning that the host of a Chi can be as many as possible but not at once. A Chi's time with a host spans for as long as the host is alive. The Chi uses its lived experiences with its former hosts to guide the life and destiny of the present host.

One can say that the Chi of a person guides his choices, destiny. It can not interfere with the decisions a man chooses to make, it can only guide, suggest or advice, the choice to make it left for the man.

The intuitive mind

Your intuition - your chi 

Your intuition realizes things and knows things long before your conscious mind. Same as your chi.

That voice that is faint but speaks to you, tries to guide you from situations and choices you make is your Chi, your intuition. If you don’t listen to it or are fond of ignoring it, it starts to quiet down.

Our intuitive mind learns and responds, even without our conscious awareness. You can train yourself to listen to it when it speaks, to become one with it. This will be very useful when making decisions about important things and people in life.

Chi cannot see the future occurrences of a man.

References

1. Being an Existence, an Interview with Chigozie Obioma
2. Can Two Persons Have the Same Chi
3. "Building a Second Brain" by Tiago Forte