Quote from goldenarm:
Not true. A good winning system should be able to fit on a bumper sticker. But it can take years for a trader to master his emotions in order to successfully implement it.
The monetary value placed on the system depends on simple supply and demand. You can find a winning system in a trading book for $15 or you can pay thousands of dollars for essentially the same thing obscured by hundreds of indicators, technical setups, oscillators, etc. But good winning systems can be distilled to the same few general concepts.
Traders can make their systems as convoluted or as simple as possible. Both methods can work. But keep in mind that out of the hundreds of technical formations out there, they all boil down to four basic setups that will make money. You should keep things simple in order to prevent from being lost in a sea of information.