RE: They're at it again4 May 2018 13:03
Endion, because the way that the market is configured is precisely to try and prevent us working out when the market makers are buying from PIs and when they are selling to them.
Before anyone jumps in to say what about direct market access and the potential ability for one PI with DMA to sell to another with DMA I will say that this is possible but seems to so rarely happen.
To carry on - the market rules are expressly set up to avoid specifying whether the Market Maker is selling shares or buying them. Thus in order to figure out whether a trade is a MM buy or a MM sell platforms such as this one use the mid-point between the advertised Bid and Ask price to distinguish what they think is a MM buy (below mid price) from MM sell (above mid price) - they even colour them differently to properly convince you that they know what they are talking about.
The trouble is the don't know the nature of the trade and are simply guessing based upon the zero-th order model that they can come up with - namely using the mid-point.
If you want to go to a first order model then you need to allow the real Bid and Ask to move about inside the advertised bid and ask bands, and to move the dividing line between buys and sells (the so called Market Maker Accumulation-Distribution line) around as the days games ebb and flow.
This is where I start from with my trading analysis - eg here :- https://www.thebushveldperspective.com/slides/slide/23-april-2018-trading-analysis-51
Now if you want to go further than that very simple first order model you need to start looking at trade-trade correlations - the simplest of which is of course the classic Bed + ISA combined trade, identified as I have described earlier in this thread - you can see a couple of these about 23 seconds into the video here. I identify these by hand and then change what is almost always two sells into one sell (black square) and one buy (black circle).
Note this is a big change to make to a trade - it is a very non-linear process and one which no, I repeat NO, Technical analysis will ever get right. This is why I do not believe any technical analysis - it takes account of no trade-trade correlations, and therefore cannot even get a simple Bed and ISA trade right. Fine if you have 0.1% Bed and ISA's perhaps, but not in this case, where the volume is actually pretty low compared to a typical 20K Bed & ISA.
This is also why I never call this analysis 'Technical Analysis' - whilst it is undoubtedly of a technical nature it should not be classed in the same category as the normal charting and line drawing fantasies.