Chicken and egg problem: You want to implement this, but don't have the time to set up proper infrastructure. If you leave it to someone else, then they might steal the whole thing, so you keep it to yourself.
Assuming this edge really require intraday trading and is actually tradable with automatic / normal execution (you have checked the practicality of it, yes?), why not try a cloud solution? Yes, it'll be "stolen", but probably kept secret. This is assuming you have a working implementation and not just a bunch of analysis. If not, you need a technical partner that you trust.
If keeping it a total secret makes it impossible to trade, then what's the use? Most successful investors / traders partner up with many different people, and many of them share their "secrets" in many ways over their lifetime. Life is too short not to share it with other people, and really, it's often how we best can continue to evolve and adapt. Cooperation is mathematically the more efficient solution, but require mature and dependable participants.
