Although you probably have already noticed it, the trading systems are evolving and becoming increasingly technical. As you can imagine, some professional traders recommend to make a qualitative leap and try to convince once and for all that the use of trend lines, price chart patterns and obsolete oscillators in the same way that comes in thousands of books it is not exactly the best approach to winning in trading. I know this is a very broad and intense debate and that many people are not quite agree, but I plan to present new ways of seeing trading that might be interesting for some.
That said, we will introduce a new way of looking at trading systems. And for this let us first reformulate their classification. Typically, systems classify roughly in the classical groups of trend followers, countertrend and pattern-based. But today I propose a completely different alternative to any other classification that you may have seen.
Considering how a system is developed, we can establish two groups of trading systems: trading systems based on models and trading systems based on exploitation (mining) of data. We will describe these groups in detail.

