If any vendor is selling a so called 'tested and proven system' - run the other way, as fast as you can. Save your thousand dollars or whatever it costs and try your own approach. If you are failing on paper, you will never pass in the real world. Furthermore, if the system was that good, they wouldn't be selling it.
I work in finance and play on the biggest casino in the world for nearly a decade, and have seen it all. We use various quant methods with in house black-box systems. These systems are not fail safe, no matter how much we tinker with them or spend on them. So you always work alongside the systems, and never leave them alone for too long.
Furthermore, the company gets so called "system" pitches every week, with people professing they they have found the secret. Really? These systems don't come cheap. They can cost anywhere from a few thousand to twenty thousand dollars or more. Our first obvious question is "why are you selling it then?" and "why not raise some capital and make it work for yourself?". Everything works great on curve fitting when back tested. That is what the success of most systems is predicated on - curve fitting. You put that system to work in the real world, it's guaranteed to fail after working for a few days to few weeks. Key to any system is to avoid curve fitting in back testing.