indeed, I remember reading about a blind trader before, I thought it was revshark but I am not so sure any more. Here is another one, Laura Sloate, she manages a $405 million stock portfolio and the Strong Value fund. She has been blind since detached retinas robbed her of her sight at age 6.Quote from Bearbelly:
.. I think it would be tough but not impossible.
http://www.tsbvi.edu/Outreach/seehear/spring01/obstacle.htm
your friend need to train himself to have a graphic memory first, and the rest is just mater of following a well laid plan, good luck.