Himanshu. Scorpio woman and Pisces man is an 5-9 combination which is considered very good in Astrology,
But still you will have to check other aspects like sun-moon aspects,venus-saturn,mars-venus.venus-neptune,pluto -venus aspects along with the ascendents to get the complete picture of this relationship.
Linda has explained regarding the chemistery and characteristics about all sunsign combinations very well in her book LOVE SIGNS. Its a must read book for all lovers.
I dont think you will find this book avaliable online for reading.
LOVE & PEACE.