Well, that's the thing. I mean volume is just a sign of interest in a security. After all, it only prints when there is a buyer
and seller. I would be rich beyond my wildest dreams if I had a dollar for everytime some knucklehead said, 'take a look at XYZ, a 5,000,000 block was bought' implying that XYZ is going to go up. I mean, c'mon! sure, 5 M crossed the tape but there were buyers
and sellers for those 5 M shares! How is that by itself bullish or bearish?
As for spydertrader's journal/JHershey's approach...from what I understand he looks for 'dry up' in selling. Again, this is a non sequitur as there is drying up in
both selling and buying. So all we can correctly say is that the market is not
interested in the security as much as it was before, so less is being traded (less is being bought and less is being sold).
After all, what makes a stock go up? more aggressive buyers than sellers right? nothing to do with the number of buyers vs. sellers. I would also be rich if I had a dollar for everytime some dolt said a stock went up because there was more 'demand' than 'supply' - obviously demand and supply MUST be equal, otherwise the stock doesn't trade!
Which is why I think this sort of thing is nonsense:
"The only fundamental factor that really counts in the stock market is The Law of Supply and Demand" - Richard D. Wyckoff
[from the link Lawrence supplied]
or something like:
Quote from MacroEvent:
volume is important as the ratio between the buy and sell side deviates from 50/50. it is the inequality of volume that i pay attention to.
I'll say it again...buy and sell sides MUST equal. Demand and supply must equal. Otherwise there are no transactions !
Hope no one gets offended, I'm just trying to cut through the pablum and the cliches to get to the bottom of this...
ok, lets step back a bit...
A transaction occurs when you have agreement on price and disagreement on value. By that I mean that I buy when I get someone to agree with me on the price of the thing, and disagree with me that present value of the thing is more than it is at that moment.
With simultaneous and paradoxical agreement and disagreement, a transaction occurs. For the price to go up, that is for a transaction to take place at a higher value, the same process takes place, but I, as the buyer, am more aggressive, that is, I put the present value of the security higher than I did before, and so does the seller. So a transaction takes place at a higher price. Nothing really to do with the quantity of the buyers and/or sellers. They will always match. They have to, otherwise we just have lots of bids and asks.
So then you don't
need higher volume for a breakout or an uptrend, as the TRID example illustrates. Sure, it is ok to see it because it means that there is a change happening in the ownership matrix of the security and that by itself could be bullish because you've got a different set of eyes/brains on the stock.
What I mean by this is that you could have a basing action which is being done predominently by 'value' investors patiently acquiring shares over a long time. Then as the price goes up, they sell to momentum buyers who slowly (or not so slowly) take over the ownership matrix of the security. This 'turnover' in the qualitative aspect of the ownership would show up as volume spikes concomitant with a rising price. Good recent examples could be ALY or BCON.
I'm just trying to think things through and the above is where my head is at right now. If you can offer a lucid explanation other than mine, I'm all ears.