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Neko Sornan
eXceed Inc. INVICTUS.
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Posted - 2007.05.02 15:04:00 -
[1]
Is there any detailed explanation available on what data exactly the price history in the market window is generated?
Thanks
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Robacz
Essence Trade Essence Enterprises
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Posted - 2007.05.02 16:04:00 -
[2]
http://www.eve-online.com/guide/en/g05.asp
Scroll down, there is some info about market interface.
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Neko Sornan
eXceed Inc. INVICTUS.
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Posted - 2007.05.02 16:21:00 -
[3]
From Player Guide:
Quote: Price History
This tab shows technical trading data on the item you have selected.
Moving Averages
A simple moving average is formed by computing the average (mean) price of an item over a specified number of periods, using the sell price. For example: a 5-day simple moving average is calculated by adding the closing prices for the last 5 days and dividing the total by 5. Remember that all moving averages are lagging indicators and will always be "behind" the price.
Donchian Channel
ò The Donchian Channel is a trend-following breakout system. It plots the highest high and lowest low over the last period time intervals.
Median Day Price
Is the average price that day.
It's a start, but what's the closing price of a day exactly? Is that based on the real transactions that happened or on the sell/buy-orders on the market? And the bars at the bottom what are they representing (I guess available units, but might be something else also)?
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Shadarle
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Posted - 2007.05.02 21:16:00 -
[4]
Eve a brief examination of the market would reveal that it couldn't possibly be based on the orders on the market. It's the orders that actually get filled.
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Neko Sornan
eXceed Inc. INVICTUS.
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Posted - 2007.05.03 08:50:00 -
[5]
Originally by: Shadarle Eve a brief examination of the market would reveal that it couldn't possibly be based on the orders on the market. It's the orders that actually get filled.
Had a bit problems to understand what you tried to say. So you think the data is based on the filled orders? Is that based on knowledge? And if it's so what is that 'closing price of a day' then? And the bars at the bottom? Available unit or perhaps the amount of transferred units? |
Ray McCormack
BIG
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Posted - 2007.05.03 09:49:00 -
[6]
All the data used is from previous completed sales. It is just the Market History Data Table put into Graph form. It has nothing to do with Sell or Buy Orders (although those of course have an effect on it once they become completed sales).
The Moving Average is the average price for that period. You take the Median Day Price and divide it by the days in that period (5d or 20d). The 'closing price' they refer to is a little misleading perhaps. http://en.wikipedia.org/wiki/Moving_average
The Donchian Channel is an indicator to show the volatility of a market price. It is used by averaging out the highest and lowest sale price over n days. There is no indication as to what the period n is in this case, although I believe it to be no more than 7 days (it appears to be 5). http://en.wikipedia.org/wiki/Donchian_channel
The Median Day Price is the average price for that day. It is calculated by dividing the total ISK traded in the market commodity by the total number of units sold. I presume the accompanying yellow slider line indicates the high and low for that specific day (note, the Donchian Channel indicates these over a period of n days).
The bar graph at the bottom indicates the volume of units traded that specific day.
I have noticed some discrepancies between the Table data and the Graph data, but I believe this to be a cache issue when travelling between different regions.
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bernside
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Posted - 2007.05.03 11:30:00 -
[7]
Just a quick correction, median is NOT the average price. It is a far more useful number. It is calculated by ordering the prices of all the sales from highest to lowest and then picking the price that is in the MIDDLE of the ordered list.
e.g. if there were 11 sales: 1.5, 1.5, 20.0, 1.5, 21.0, 1.5, 1.5, 1.5, 1.5, 1.5, 20.0
The median is the sixth result in the following list: 21.0, 20.0, 20.0, 1.5, 1.5, 1.5, 1.5, 1.5, 1.5, 1.5, 1.5
Which is 1.5.
The average (or mean) of that same result set would be: 6.6.
in keeping with the post above: median
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Neko Sornan
eXceed Inc. INVICTUS.
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Posted - 2007.05.03 11:34:00 -
[8]
Thanks for the explanations. |
sgtbenc
Gallente Master Crusaders
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Posted - 2007.07.04 15:58:00 -
[9]
What are the shorter green vertical bars at the bottom of the Price History tab? I see nothing to explain them in-game or otherwise.
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Ray McCormack
BIG
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Posted - 2007.07.04 16:32:00 -
[10]
Originally by: sgtbenc What are the shorter green vertical bars at the bottom of the Price History tab? I see nothing to explain them in-game or otherwise.
Volume.
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Shar Tegral
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Posted - 2007.07.05 00:21:00 -
[11]
Read market history like the experts. Go to table view and leave the graph alone. More precise and less confusion.
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Amicus Pauperi
ASGARD SECURITY SHIPPING PRODUCTION SMASH Alliance
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Posted - 2007.07.05 06:15:00 -
[12]
Originally by: Shar Tegral Read market history like the experts. Go to table view and leave the graph alone. More precise and less confusion.
Read market history like the true experts. Use both the table view and the graph, understanding the strengths and weakness of both. Precision with a visual summary.
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