Antonia, please tell your Portuguese friend, and also to remind EVERYONE, that the name for these protests stems from a booklet/pamphlet (in the C18 sense) penned by Stéphane Hessel, a very old guy of originally German origin, but a French citizen from adolescence, who was active in the Resistance and drafting the postwar human rights charters. http://pt.wikipedia.org/wiki/St
Unfortunately the Portuguese language article is a stub: the articles in French, English, Spanish and German (at least) are complete articles with reference to his booklet, "Indignez-vous" in French, which became "Indignaos" (if my not-perfect Spanish serves me well, and I'm not looking it up this late in the evening" and "Time for Outrage" in English.
This is important, as while the fact that these protests have spread to Wall Street and the US has obvious historic significance, it is just as important to remember that they did NOT start there.
Periodisation is a difficult task for historians. One can clearly trace the filiation of these protests back to the immediate spark of the so-called "Arab Spring" (which pisses off my Berber friends in North Africa) but very similar "modern" or post-modern protests certainly go back as far as the great public response to the economic crisis in Argentina ten years ago (and we see echos of that next door in Chile right now).