Quote from marketsurfer:
This lays out one of the fatal misunderstandings--- Not only are "footprints" ipso defacto the past, the map isn't the territory. HFT, which is your competition doesn't trade large blocks that you think you can "see" flowing in on your charts. In fact, HFT trades very very few shares at a time-- For you to believe you can see this is delusional and if you actually could, the nature of it, designed to be undetectable, would do you no good. What you do is Tea Leaf reading, just admit it. surf
Oh, now I see where we misunderstand each other and that probably causes even more argument. HFT is not my competition. HFT deals with the shortest price excursions, while I look for intra-day swings, which last from minutes to hours.
What I look for is an example you told me before and now, after reading Gallacher's book I see where is taken from: what if some rich man decides to buy huge amount of some equity or commodity... Let's drop the fact that any single person is unlikely to dominate any of the world's top liquidity markets during their most active sessions for the sake of experiment and just imagine it happened. He decided to buy a few billion dollars worth of say NQ (which I trade).
What will he do? Unlikely just log into his retail IB account and just hit buy 100,000 contracts NQ. I think you would agree with me here.

So he will most likely instruct his personal broker to buy that instrument and the trade is going to be executed by an institutional trader... in pieces (because obviously single order of a size like that would just cause insane price movement and result in much worse fill than desired)... so, in pieces, which means buying in a way, which possibly gives the best fill price (many institutional traders benefit from executing @ better than desired prices, you are close to the market, you probably confirm that). So his goal is disguise that he is buying such a huge amount of the instrument as much as possible. But can he disguise it completely, assuming price inevitably shows every transaction occurred? Ha ha... OK, enough said for the smart people to guess... for now.
