Quote from southall:
The OP has every right to grab a share of the trading system for sale market. If he doesn't then some one else will. People want to buy systems and always will do. Im sure Murray's stuff is better than 99% of the crap out there, although that still doesn't mean his stuff is profitable, perhaps it might just lose less money than the competition.
Really good (ie robust) edges in the markets are like gold dust. Very hard to find. Why would anyone ever want to disclose one even with a NDA contract in place, if its any good it will leak out.
I cant ever see a trader ever disclosing a good trading edge (even for 250K a year and NDAs), the only reason would be because its not a very robust edge in the first place, they were never going to trade it themselves, and so they really got nothing to lose by selling it.
Very good summary. Real money making edges are almost never disclosed. The only exception that I could think off was during SOES days, when Daytek, Houtkin and the like needed a band of traders to execute.