Understanding The Undermine Journal
One of the most powerful tools available for making gold is The Undermine Journal. It has a ton of information and can be very overwhelming. Before you can get started using it you will need to set up which realm you want to look at, and whether it is on US or EU servers.
Once you have chosen your region there will be a very a huge list of realms to choose from. It’s a large list and even though they are in alphabetical order it can be a little difficult to find the specific realm you are looking for. The realm names can blend together and cause an optical illusion of sorts.
For this reason I suggest using the FIND shortcut. For windows you press the F button while holding the CTRL button (CTRL + F). For mac you press the F button while holding the ⌘ button (⌘ + F). Type in at least part of the name of your realm and it will highlight making it much faster to find.
Once you have chosen your realm you can start to access all the information that has been recorded. Among other things you can see who the “Top Sellers” are (currently, it does change) on your realm, what item has the “Most Available” and even some “Potential Deals”. For this example I am going to use Draenic Dust. EVERY CHART BELOW IS ABOUT DRAENIC DUST, NOTHING MORE AND NOTHING LESS.
Keep in mind that the information is updated every hour. The closer you are to the next update the less accurate the information will be. The time since the last scan and time until the next can be found under the search bar, near the top right of the page.
Current Price: The price of the cheapest auction at the time the data was last checked.
Median Price: Essentially the “middle” price. The halfway point between very cheap and very expensive.
Mean Price: The “average” price. Often very close to the Median Price.
Standard Deviation: How close most auctions are to the Mean Price. For this example it means most auctions of Draenic Dust are usually between 3.59g and 4.43.
Typical Auction Age: How long it will usually take an auction to sell. If it hasn’t sold by this time it will probably not sell, though there is still a decent chance.
Max Auction Age: The longest it can take an auction to sell. Usually if an Auction has been up for this long it has been undercut too much and will not sell. At this point it’s usually best to cancel and try selling it again.
US/EU Quantity: How many were available at the time the data was last checked across the entire region.
US/EU Median Price: The halfway point between very cheap and very expensive across the entire region.
US/EU Mean Price: The “average” price across the entire region. Often very close to the Median Price.
By putting the mouse over a specific point of the chart it displays the information in a small tooltip. All the charts on The Undermine Journal have this useful feature. You can also click and drag an area of the chart to zoom in and see more detailed information. This can be very handy for identifying the data behind large changes in value.
This chart can help identify trends in supply and demand over a short period of time. Keep in mind that it’s best not to rely on this chart alone when making any important investment decisions.
This chart displays the “Current Price” as a blue line, the “Available Quantity” as a red line AND the “Region Price” as the green line over the past 6 months. Although it is not displayed in the tooltip the Region Price is the average of all prices within the region (either US or EU).
This chart allows you to see trends across a much larger period of time. More importantly it allows you to see how the prices on your realm compare to others during this time. This can help you determine whether it is a market worth looking into on your realm or not.
Here’s where things get interesting. This chart separates the “Current Price” from the “Available Quantity” and adds extra detail into both. In order to really explain this chart though it’s best to zoom in.
To put it simply the blue box tells us what the price of Draenic Dust was at the start of the day and what the price was at the end of the day.
The blue line tells us what the absolute highest and lowest prices were during the day.
The green line shows the average price of all auctions for the entire day.
As for the quantity, it is represented by the red line and area.
The red line shows the average quantity available for the entire day.
The red area shows the lowest quantity and the highest quantity available during the entire day.
This chart is very valuable because it shows so much detail but it can be difficult to get real value out of it. Even when looking at this chart it’s best to zoom in on specific parts of the chart that stand out, rather than to read the entire chart as a whole.
Pricing Heat Map
This is probably my favorite chart. It shows the average price of all auctions for your realm. It separates these prices by day of the week and by time of day and displays it in a grid format. The darker purple any specific cell is the higher the value of the item during that day and time. The lighter purple the cell the lower the value of the item at that day and time. This can help you find patterns in prices based on the time of day and day of the week.
Quantity Heat Map
Following the same structure and rules as the Pricing Heat Map, this chart shows the average quantity of items for sale. Dark red cells means a higher number of items and lighter red means a lower number. This is best used in combination with the Pricing Heat Map to determine when it is best to list your auctions.
Age Heat Map
Again, this chart is similar to the Pricing Heat Map. It shows the average age of auctions that were equal to or lower than the market price for that time and day. A younger age means that more new auctions were being added. Dark green represents old auctions while lighter green represents younger auctions.
Regional Daily Summary
This chart ignores your realm. It shows the same information as the Daily Summary, but it shows it for the entire region. This chart displays the “Region Price” as a blue line and the “Region Available Quantity” as a red line. This can help you identify if price changes are unique to your realm or if it is a region-wide change.
Realm level changes are usually the result of a new person entering the market or an influx of people using Bots. Region level changes are usually the result of a new method of farming being discovered or changes made to the game by Blizzard.
Current Regional Prices
This chart shows the same information as the Regional Daily Summary but it is organized by realms. It displays the Market Price as a blue line and the Available Quantity as red bars. The realms are organized from highest value on the left to the lowest value on the right. It will also show you where your realm is on the chart.
Price Population Scatter Plot
This chart shows the same information as the Regional Daily Summary but it is organized by realm and by population. Simply put, the higher the population of the realm the further to the right it is. Your realm will be the red diamond mixed in among all the blue dots.
There is a huge amount of data on The Undermine Journal. I don’t use this website nearly as much as I should. And I didn’t even get into everything that it can do either. All I wanted to do was try to explain what each different chart represents.
On that note I want to say this. I am not an expert with this website. I know that I do not use this information to it’s maximum potential. I’m sure there are plenty of others out there who understand how to really make the most out of all the data that this website provides. My reason for creating this isn’t to tell people what they should use this for. It’s to explain what the different charts represent. How you use that information is up to you.