Net Buy Volume(NBV)

NBV=No. of shares bought-No. of shares sold, for a certain time period.
Does anybody know which software provides this indicator?
A really useful & simple strategy can be devised with this indicator.
"If you can find strong divergences in the net volume and price, it can usually hint at pro-traders accumulating stock. For instance, if on one day 5mil shares are bought at the ask and 3mil shares are sold at the bid, the NBV (net buy volume) is 2mil shares. Naturally, since the NBV is positive, you would expect to see the stock trending up on that day. However, if you see the stock trending down or flat-lining on that day, then you have just spotted a valuable divergence.
This kind of divergence usually occurs when professional traders (who want to accumulate a stock) hammer the bid with sell orders whenever the stock tries to run up. Then, they place buy orders to catch all the shares that nervous retail traders are selling."
I got this from a website.
In absence of an indicator, eod buy/sell volume will do. The problem is I don't know where to get buy,sell volumes seperately.
Any suggestion will be much appreciated.

The total number of share Bought has to be EQUAL to Total number of shares Sold.
Now how do we get the data for Share bought at Ask and Sold at Bid...
Do Exchanges give out this Data... both Intraday and EOD...???

i guess ur talking abt the OBV indicator..

Sry for the ambiguity. By buy/sell volume, I had meant "bought at ask"/"sold at bid".
In fact, i've found out 1 site whch provides this information.it's "in.advfn.com".
Though they provide free basic services 4 BSE,NSE their premium features support only US,UK markets. What I need is realtime data on NBV for NSE.

OBV is cumulative price diff*volume. This is "vol bought at ask- vol sold at bid". rkkarmani can clarify my confusion.

Sry 4 d ambiguity. By buy/sell vol., what i meant was "vol bought at ask- vol sold at bid".
In fact, there's this site in.advfn.com, whch provides ths data. their basic service covers NSE,BSE. but premium services are only 4 US,UK markets.
What I need is realtime data on NBV 4 NSE.

Sorry to disappoint you, I am not well informed of this Subject so cannot clarify.
Look forward to more input from you about your idea.

It is not bad idea. But, why you can watch market depth for NBV?
Also, so many operators order more volume of share on sell side, at very low price[Eg; sell RIL @1.00 - 10,00,000].
Now they bought the shares. But, we are in seller side . at last we loose our money.

Well, not very clear.. what you are trying to convey, kindly elaborate whenever time permits..!!!

Reliable's software 'Falcon', of which i used to have access for some time last year, had this feature where it displayed whether each tick was buyer initiated or seller initiated (basically, bought at ask or sold at bid). So, one could transfer that data into Excel and find out the total volume 'bought at ask', and total volume 'sold at bid' for any time period.

I tried for a few days to record at each half hour the 'bought at ask' and 'sold at bid' volumes, and see if there were any divergences or any other noticeable correlations. I found none of them workable. Often there wasn't much gap between buyer initiated and seller initiated trades in the period (54%:46% or thereabouts in most periods), and when there was a one sided bias, (ex. 70% buyer initiated trades in a period) then in that period the prices always moved in the direction of the biased direction.

Anyway, you can check that software out if you feel this matches the kind of data you were searching for.