Phaladeepika is a treatise on Hindu astrology written by Mantreswara. The text is written in lyrical Sanskrit verse comprises 865 slokas and 28 chapters. It is one of the more significant works on Hindu astrology, along with Br.hat Para-s'ara Hora-s'a-stra of Parashara, Brihat Jataka of Varahamihira, and Jataka Parijata of Vaidyanatha Dikshita. It deals in a most comprehensive and authoritative manner with almost all astrological aspects of human life. Mantreswara has equated a retrograde planet with an exalted planet in strength and effects even though it be in an inimical or its debilitation sign differing with Saravali which states that benefics are powerful when retrograde and cause Raja yoga (Hindu astrology) but malefic when retrograde do not confer favourable results. (Wikipedia)