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A few "Price History" questions.
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Caelis Magistran
University of Caille
Gallente Federation
#1 - 2016-10-25 13:54:43 UTC
Orders = Fulfillled buy and sell orders ?
Quantity = Number of items being bought and sold?
Low = the lowest price an item was sold through a buy-order?
High = the highest price an item was being sold through a sell-order?
Avg=???

If Low=High means only items were sold through a sell-order?


Have other questions too but let's start with these basic ones first :)

Tx
Tipa Riot
Federal Navy Academy
Gallente Federation
#2 - 2016-10-25 15:35:17 UTC
Let's start with that, the displayed values are not reliable, CCP does some "magic plausibility cleanup" and removes too low or high values. For example I have a sell transaction of Compressed Rich Plagioglase at 8523 in my books, but on that day the maximum shown is ~8100. Otherwise the number of transactions and number of items should be accurate, although they are updated very infrequently. The average price shows you whether it's a sellers or buyers market.

I'm my own NPC alt.
voetius
Grundrisse
#3 - 2016-10-25 17:21:17 UTC  |  Edited by: voetius
Caelis Magistran wrote:
Orders = Fulfillled buy and sell orders ?
Quantity = Number of items being bought and sold?
Low = the lowest price an item was sold through a buy-order?
High = the highest price an item was being sold through a sell-order?
Avg=???

If Low=High means only items were sold through a sell-order?


Have other questions too but let's start with these basic ones first :)

Tx


Orders - yes

Quantity - yes

Low and High - yes, but CCP remove "outliers", as Tipa mentioned above. How they decide what is an outlier is a question often asked but CCP have never made it explicit. For practical purposes it just means that if someone buys or sells something way outside the normal price range for a product, it's not included in the market table or graph.

Average - is the arithmetical average. You can easily see this by looking at the market table for low volume items and doing the calculation

Low = High - no, either the goods all went to a buy order or all went to a sell order.

Edit. Missed one point.
Caelis Magistran
University of Caille
Gallente Federation
#4 - 2016-10-27 04:12:28 UTC
Tx for the answers.
Another question :

So the number of orders gives the frequency of the item is being bought or sold.
The higher the better for station trading?

Can I find that number in the api or is there a way to calculate it through the data provided with the api?
Rhivre
TarNec
Invisible Exchequer
#5 - 2016-10-27 05:37:16 UTC
Tipa Riot wrote:
Let's start with that, the displayed values are not reliable, CCP does some "magic plausibility cleanup" and removes too low or high values. For example I have a sell transaction of Compressed Rich Plagioglase at 8523 in my books, but on that day the maximum shown is ~8100. Otherwise the number of transactions and number of items should be accurate, although they are updated very infrequently. The average price shows you whether it's a sellers or buyers market.


CCP Quant is looking into the history values problem :)

Hopefully it will get fixed soon

Fluffy Bunny Pic!

Cista2
EVE Museum
#6 - 2016-10-27 06:27:09 UTC  |  Edited by: Cista2
Caelis Magistran wrote:

So the number of orders gives the frequency of the item is being bought or sold.
The higher the better for station trading?


When you start trading and have little money, the variable you want to maximise is the profit margin (in %). That one you have to look for manually.

As your wealth grows, it is the combination of turnover (count) and profit margin (in ISK) you wish see highest in an item.

When you get really rich you will be restricted to trading only the items with the highest turnover (ISK) per day.

My channel: "Signatures" -
Rhivre
TarNec
Invisible Exchequer
#7 - 2016-10-27 10:54:54 UTC
Caelis Magistran wrote:
Tx for the answers.
Another question :

So the number of orders gives the frequency of the item is being bought or sold.
The higher the better for station trading?

Can I find that number in the api or is there a way to calculate it through the data provided with the api?



The number of orders is less important than the volume imo.

That tells you how much of the product moves

Fluffy Bunny Pic!