Amir, former test captain Salman Butt and fast bowler Mohammad Asif face lengthy bans if found guilty of spot-fixing during Pakistan's test series in England last year.
"When the nation's prayers are with you, you don't feel so scared and there is hope," Amir told Geo TV as he left the Qatar Financial Centre building where the hearing is being held.
"It's been difficult to sleep over the last few nights but my eyes are open now and when good news comes I will hopefully be able to close them properly.
"We are satisfied with how things have gone, and my family's prayers are also with me. I'm feeling good and am hoping for some good news."
Amir is accused of taking bribes to bowl no-balls at arranged times during the Lord's test.
His lawyer Shahid Karim said he hoped the judges would take their time in reaching a decision.
"We have requested the judges to look at the case carefully and properly and with due consideration before they announce the verdict," he said.
"If they have looked at it with thought and consideration, then after we finish they'll tell us if the verdict is announced today or at a later date.
"I am satisfied that the hearing has been very good and impartial, and I can say from our point of view at least we are hopeful. The onus is now on the judges."
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