Position of Hands in Qiyaam (Hadith No. 707)

Volume 1, Book 12, Number 707:
Narrated Sahl bin Sa'd:
The people were ordered to place the right hand on the left forearm in the prayer. Abu Hazim said, "I knew that the order was from the Prophet ."

Don't worry about the fingers. What's important is: your right HAND should be on your left FOREARM.
Alhamdulillah, Hadith is very clear. I don't feel the need to explain..