What do depth, spread and turnover mean?

Depth is the units listed now. Spread is the gap between the 25th and 75th percentile of the listings at the latest scan, as a share of the median: a wide spread means the price you get depends on timing. Turnover is how much of the shelf changes a day, so a high turnover means the item sells.

What is a supply shock on the auction house?

The newest day of scans shows an item listed in a quantity two standard deviations away from its previous 30 days. Flooded means far more than usual is listed, and the price tends to sag; drained means the shelf emptied, and the price tends to climb.

Market structure

Pick a market. Every item shows how much of it you can move, how fast its shelf turns over, and whether its supply just changed.

For the size of each house as a whole, see the economy of every megaserver.

Current market: Normal Alliance CN. This browser opens every tool here until you pick another. Address for this market: ahledger.com/structure?market=forever/normal/alliance/cn

1MarketStructure needs a few days of scans on the market.

▸How this is worked out

Depth is units listed now. Spread is the gap between the 25th and 75th percentile of the book at the most recent scan, as a share of that scan's median. Turnover is how much of the shelf changes per day. A shock is the newest day's quantity sitting two standard deviations from the 30 days before it.

Only a day or two of history so far, so turnover and shocks are provisional. The sample column says how many days sit behind each row.

Depth and turnover · Normal Alliance CN

Item	Depth	On the house	Spread	Turnover	Volatility	Days
Pattern: Mooncloth Bag	1	999g 13s	0%	-	-	1
Underworld Band	5	925g	2%	29%	0%	2
Staff of Jordan	2	910g	3%	67%	54%	2
Gut Ripper	4	720g	28%	100%	1%	2
Gromsblood	178	355g 98s	0%	-	-	1
Expert First Aid - Under Wraps	282	327g 12s	19%	99%	5%	2
Kang the Decapitator	1	300g 69s	0%	-	-	1
Icemail Jerkin	2	300g 24s	32%	-	-	1
Mithril Ore	4,849	290g 94s	17%	86%	35%	2
Scarlet Gauntlets	11	275g 99s	54%	46%	6%	2
Fiery War Axe	3	240g 69s	0%	100%	19%	2
Lesser Moonstone	1,216	233g 22s	59%	61%	96%	2
Sealed Journeyman's Writ	352	214g 64s	80%	31%	104%	2
Warmonger	1	200g	0%	-	-	1
Blueprint: Tanning Rack	10	200g	50%	67%	65%	2
Gloves of Holy Might	3	197g 67s	11%	40%	27%	2
Mageweave Bag	130	195g	24%	106%	14%	2
Robes of Insight	1	188g 89s	0%	0%	0%	2
Journeyman's Backpack	16	188g	17%	61%	36%	2
Item 287012	6	180g	73%	67%	30%	2
Heavy Stone	5,263	177g 88s	6%	14%	12%	2
Runecloth	697	167g 28s	0%	56%	1%	2
Blue Pearl	269	166g 72s	3%	82%	10%	2
Recipe: Savory Whimsyfin Delight	50	166g 50s	13%	13%	39%	2
Thick Leather	3,314	165g 36s	8%	91%	7%	2
Silk Cloth	8,123	160g 2s	3%	21%	1%	2
Tiny Crimson Whelpling	20	159g 80s	13%	26%	8%	2
Frost Oil	110	159g 47s	3%	126%	1%	2
The Butcher	4	150g 64s	2%	100%	23%	2
Boots of Avoidance	3	150g 54s	0%	67%	0%	2
Item 287006	3	150g 3s	40%	67%	97%	2
Bronze Bar	7,780	147g 82s	11%	35%	2%	2
Mageweave Cloth	2,545	143g 79s	23%	13%	14%	2
Wintersbite	1,383	142g 86s	3%	2%	37%	2
Frilled Lichen	706	134g 91s	31%	68%	3%	2
Solid Stone	6,722	133g 76s	43%	71%	28%	2
Vibrant Plume	150	131g 97s	1%	122%	15%	2
Medium Hide	2,551	130g 10s	289%	48%	21%	2
Elixir of Agility	822	126g 58s	11%	31%	20%	2
Shadow Oil	123	120g 54s	0%	34%	0%	2
Parrot Cage (Hyacinth Macaw)	2	120g 32s	47%	67%	50%	2
Heavy Leather	6,140	119g 73s	6%	34%	1%	2
Savory Whimsyfin Delight	739	117g 35s	6%	2%	5%	2
Iron Ore	3,458	112g 73s	1%	7%	5%	2
Scorpion Sting	11	109g 89s	30%	77%	33%	2
Expert Cookbook	97	109g 61s	2%	13%	3%	2
Thick Leather Ammo Pouch	86	108g 36s	13%	113%	58%	2
Silver Ore	1,255	106g 17s	4%	20%	11%	2
Bolt of Mageweave	291	101g 26s	7%	36%	7%	2
Ring of Saviors	2	100g 84s	0%	-	-	1
Recipe: Transmute Water to Undeath	1	100g 57s	0%	0%	0%	2
Pattern: Dusky Boots	5	100g 50s	0%	100%	0%	2
Libram of Constitution	1	100g 1s	0%	0%	0%	2
Basilisk Hide Pants	5	100g	135%	67%	1%	2
Heavy Hide	1,105	99g 33s	54%	7%	23%	2
Golden Pearl	37	98g 77s	13%	35%	39%	2
Dark Phantom Cape	1	98g 73s	0%	-	-	1
Barbaric Bracers	51	95g 88s	11%	62%	7%	2
Winged Helm	2	90g 90s	11%	-	-	1
Plans: Mithril Shield Spike	5	90g	6%	67%	24%	2

A tight spread with high depth is a market you can move size in. A wide spread with low depth moves against you the moment you buy.

Day of week

Day	Price index	Listings index	Days
Sunday	1.044	0.898	1
Monday	0.956	1.102	1

Each day is indexed against the week around it, item by item, so neither an expensive item nor a market that drifted over the quarter can tilt the table, and the seven are then centred so an average week reads 1.000. Under 1.000 is a cheap day to buy; over 1.000 is a good day to sell. The Days column counts the days behind each figure, not the readings, so read it once there are several weeks there.

Common questions

What do depth, spread and turnover mean?: Depth is the units listed now. Spread is the gap between the 25th and 75th percentile of the listings at the latest scan, as a share of the median: a wide spread means the price you get depends on timing. Turnover is how much of the shelf changes a day, so a high turnover means the item sells.
What is a supply shock on the auction house?: The newest day of scans shows an item listed in a quantity two standard deviations away from its previous 30 days. Flooded means far more than usual is listed, and the price tends to sag; drained means the shelf emptied, and the price tends to climb.