When two natal charts are almost identical, it indicates a strong sense of synchronicity between the two people. This could be because of shared life experiences, similar outlooks on life, or even a deep soul connection. On one hand, it could mean that the two people are likely to be kindred spirits. On the other hand, it could mean that both people are likely to endure similar challenges in life and may need to help each other out to overcome them. In either case, it is important to remember that the two charts are not completely identical and to look for their individual meanings.