I just read that review on the link I posted, this is just too funny and so true:
His explanation of selling "short" is as cogent and understandable as any I've ever read and he concisely explains, in a sentence or two, why that stockbroker to whom you are paying a monthly fee often has no better idea of what is going to happen day to day than a dart-throwing chimpanzee.
Market Data 
Markets 
AI
