Certain planets in odd signs gets a strength of 15 Shashtiamsas while some others get 15 Shashtiamsas strength in even signs.
The Sun, Mars, Jupiter, Mercury & Saturn, when they are in Odd Sings get a strength of 15 Shashtiamsas. Moon and Venus get the same strength in even signs.
This should be applied to both Rasi & Navamsa charts. Hence this strength is known as OjaYugmaRasyamsa Bala
Oja – Odd
Yugma – Even
Rasi –
Amsa – Navamsa