Quote from CommunistMonkey:
TraderZones is right. In essentially zero cases will anyone sell/share a working system.
If you'd done all the work necessary to make a solid system you wouldn't be so willing to part with it. If it worked, was forward tested with real money and still preforming well, you probably wouldn't share it with anyone.
If it's 1/2 an idea that's backtested well (possibly curve fit) and looks decent you might propose something like this.
This is your problem: from a third parties perspective you're basically saying that you'll show them how to flip a coin and if it comes up tails you want a cut and if comes up heads, sucks for them. It's on you to prove your system is better than a coin flip and you probably can't do that without essentially giving the system away.
that is a reasonable summation.