To outsiders, the market seems full of variables, impossible to grasp, and not much different from gambling. In reality, trading has its own rules to follow. The first key to becoming a winner: find the right operational model and solidify it, turning variables into constants. This is the most important entry-level concept and the key to determining whether one can achieve stable profits. If the concept is wrong, all efforts will be in vain; if the concept is right, one has entered the correct door, and as long as one persists, success will eventually come.