Here it is: the original one: http://www.elitetrader.com/vb/showthread.php?s=&threadid=107834&highlight=homeless+daytrader
Heres a cartoon one from the book 'rules of the trade'. I once sent it to an old friend who used to trade IPOs, back in 2000 he bought a few thousand shares in an overhyped IPO on margin at 90 only to have sell them the next day for 60.
That's the one. His face is a little weird, but I bet I can paste mine overtop. You can find me in the automated trading forums, provided the police have not removed me from the street corner.