Hello everybody. I've been day-trading for one year. Lastly I've been checking some of the websites from of the markets and ecns, and I have no clear idea about how the market interconnection is built ( the way the markets and the people are connected). Here are some questions I would like to ask: -Do the markets have a centralized or decentralized structure? I mean are all the markets connected to a network called STFI, the basic one that everybody is connected to? -If the previous questions is correct. I'm using Sterling software. In some of the websites I read that Sterling gets acces to the markets by a big routing system called FIX, is it true? -If anybody knows any website explaining these type of issues please tell me. I'm starting to learn trading from the very basics. Thank you very much.