Antardasha (sub-period or bhukti) is the division of a Mahadasha into nine sub-periods, each ruled by one of the nine grahas in Vimsottari sequence. Each antardasha lord modifies the outcomes of the Mahadasha lord during its tenure. Interpretation requires examining the natal relationship between the Mahadasha and Antardasha lords — their mutual aspect, sign exchange, friendship, or enmity shapes how the period unfolds. The sequence of antar lords within a Mahadasha follows the same Vimsottari order starting from the Mahadasha lord itself.