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07022007, 09:32 PM  #1  
Trading With Market Statistics.II The Volume Weighted Average Price (VWAP). In order to shed more light on this, I want to introduce the concept of the volume weighted average price or VWAP. The VWAP is a well known quantity used by institutional traders to gauge there trading performance. It's use as a day trading tool however has not been fully explored. The VWAP is simply the average of the Volume Distribution Function. The figures below show examples. The red line is the PVP of the distribution and the light blue line is the VWAP for the distribution. To compute it, take the volume Vi for each bar i in the distribution, multiply it by the bars price, Pi, compute the sum, SUM(PiVi) and divide by the total volume, Vtotal, for the whole distribution: VWAP = [SUM (PiVi)]/Vtotal The VWAP has the following characteristics: 1) Being the average for the entire distribution, Volume traded above the VWAP is identical to volume traded below the VWAP. In terms of the distribution function as a probability function, it means that when price action is at the VWAP, there is equal probability for price to move up as there is for price to move down. As corollaries then we have: 2) if the VWAP is above the PVP, then more volume has traded above the PVP than below it. The distribution function is thus skewed to the upside and the expectation is that at the PVP, price action should move up. Take a look at the figure below, the ER2 for June 28,2007. At the end of the day, the VWAP (light blue line) is at 847.98 and the PVP at 846.60. The VWAP > PVP hence more volume was traded above the PVP than below. 3) Conversely, if the VWAP is below the PVP, then more volume has traded below the PVP than above it; the distribution function is skewed to the downside and the expectation is that when price is at the PVP, price action should move down. You see this in the following figure for ES on June 11, 2007. The VWAP is at 1525.32 and the PVP is at 1528.75. VWAP < PVP. Clearly the amount of the skew will be a function of the difference between the VWAP and the PVP. 4) If the VWAP approximately equals the PVP, then the distribution function is symmetric. In this case when price touches the PVP, there is no expectation of price movement in either direction. Instead, expect to see small oscillations about the VWAP. The next image shows this for ER2 on June 22, 2007. VWAP = 840.44 and PVP = 840.20. Oscillations about the VWAP occured for most of the afternoon starting at 13:30. 5)The VWAP and its relation to price also determines the trend of the market as follows: a)If Price >> VWAP, the trend is up b)If Price << VWAP, the trend is down. . 6) Finally it doesn't matter on what time scale you plot the distribution functions and its associated VWAP. The chart could be a 1, 2 ,3 minute etc time chart, or a tick chart, or a range bar chart or a volume bar chart. The distibution and hence the PVP and VWAP are all the same. You need only take a quick glance at the VWAP and its relation to price, to decide the trend of the market. In future threads I will present some examples of how to use this information for entering a trade. In part III we will start with the newbies, since they need the most help. After that we will look at more complex situations using only the distribution function and the VWAP. There is a lot here to digest, so I will stop for now Comments are welcome. JERRY Last edited by jperl; 08192007 at 10:46 AM.  

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07032007, 12:58 AM  #2  
Re: Trading With Market Statistics.II The Volume Weighted Average Price (VWAP).
Hi Jerry, as an example of what you are doing, why not do a day by day analysis based on your methods. That way we can also learn the weaknesses and nuances required to understand your approach. Thanks in advance! ws  

07032007, 02:32 PM  #3  
Re: Trading With Market Statistics.II The Volume Weighted Average Price (VWAP). Quote:
JERRY  

07032007, 04:17 PM  #4  
Re: Trading With Market Statistics.II The Volume Weighted Average Price (VWAP).
A quick question: the VWAP constantly moves throughout the current trading day. I see you have the horizontal line, is this line the close of previous day?
__________________ "Today is not my day, but it'll be my week."  

07032007, 08:32 PM  #5  
Re: Trading With Market Statistics.II The Volume Weighted Average Price (VWAP). Quote:
JERRY.  

07052007, 12:37 AM  #6  
Re: Trading With Market Statistics.II The Volume Weighted Average Price (VWAP).
I'll ask this now but I guess I might have to wait for the videos to understand this. The way I see it is that you need to really wait for most of the day to finish before you get a clear development of your volume histogram so the VWAP and PVP would be used retrospectively i.e: the VWAP and PVP made today would give me an indication of what to expect tomorrow? In essence this seems to be similar to MP but using volume histograms instead of TPO's. Correct me if I'm wrong though. It's a very interesting thing you've got going on here.
__________________ Nick Constantin Always look on the bright side of life...da da da da da da da da da  Monty Python  

07052007, 04:20 AM  #7  
Re: Trading With Market Statistics.II The Volume Weighted Average Price (VWAP).
Good stuff Jerry. I have a few questions and observations but I'm going to try and hold my tongue until until you are a bit further along. Its tough but I'm gonna try :)
 

07052007, 08:20 AM  #8  
Join Date: Oct 2006 Location: Stockton Springs, Maine Posts: 1,439 Thanks: 0
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 Re: Trading With Market Statistics.II The Volume Weighted Average Price (VWAP).
Again, very much looking forward to this discussion. Looking back, this is some pretty powerful stuff. Nice area to be aware of for sure. And Nick, I believe you're right. I've been looking at the prior days VWAP and PVP and that seems to work very nicely.
 

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