Institutions know the money flow and can pick off more or less any point they want.
Relatively simple with an institutional indicator, which I have, picking off pulls from irrational.
Having been an institutional trader earlier in my career ( commercial energy ), generally speaking their trading desks don't waste time and resources "picking off" small lot orders. In fact, for the most part their trade holding time frames and trade origination purposes are not necessarily aligned with short term spec order flows.
I have have had four clients who are institutional order desk brokers at IB's since I started this training gig in 2008. They match up buy and sell orders between institutions all day long. I have a friend who makes markets in OTC interest rates swaps at Northern Trust in Chicago - he tells me the order flows between institutional clients are so well balanced that his book is for the most part delta neutral and he doesn't carry a big hedge inventory.
Point being, watching big individual specs would likely be more useful from a "tea leaves" standpoint than tracking institutional order flow IMHO.
