We don't always have an accurate birth time. Without this, about half the information that astrology can offer is lost. Chart Rectification estimates your time of birth. I will look at the actual events of your life, and find what birth time best corresponds with a horoscope that matches the actual events of your life.
Note: Chart Rectification is laborious, and my rates reflect the time required to perform this analysis. To start, I'll need a list of at least 15 significant events in your life, spaced over your lifespan, ideally evenly distributed over each decade.