Hi, I am wondering if I can build a strategy using level 2 data. For example, if I have historical level 2 data for the past year, I would be able to know if any market maker has a heavy holding of a certain security as long as the entry price, then I just follow the market maker (buy if the price falls below their entry price, sell if the price raise up to a certain extent that the market maker want to sell) because they have a good chance to make money. I have done some research online and nobody talks about it. Is this just my silly thought?