Anticipative Strategic Intelligence is understood as a process of transforming information from the company's relevant environment into strategies. This process allows the company to perceive, analyze, interpret and act based on signals from the business environment. Weak Signals (WS), despite its fragile name, can alert us about a possible event in the future. However, the exploitation of WS is, indeed, a challenging business, because to get it in any environment is not an easy task. The French method "Anticipative Strategic Intelligence" was conceived to, from WS, lead managers to act, in a proactive and collective way. Therefore, it gives for those companies or organizations that adopt the method a unique and competitive feature.