Stacked Decks
Plan an opening. Compare purchase cost, possible returns and rare-card chances across your whole batch.
Drop rates: The Prohibited Library. Prices and trades: GGG Currency Exchange API.
How an opening is valued
Each card's chance comes from Stacked Decks the community opened and counted. Expected card value adds up every card's chance times its price, for each deck you open. Expected net profit subtracts what you pay for the decks.
The average includes rare jackpots that most batches never draw, so a typical batch usually returns less than the average.
How cards are priced
A card's price is the lower weighted median of its Currency Exchange trades over the last 24 hours, 48 hours or 7 days: the shortest window with at least 10 traded, unless one hour holds more than half of them. Trades over 50 times a card's usual price are ignored; they move currency between accounts.
A card with fewer than 10 traded in 7 days, or traded in only one hour, counts as 0. Ignore low-volume cards goes further: cards traded fewer times a week than your threshold count as 0 too.
The history page values each day the same way.
Buying a batch
Choose how many decks to open and the rate you can buy at. A recent price is the starting reference; change it, or go back with Use reference rate. Rates in decks per Divine use at most one decimal.
Buy cost assumes the whole batch fills at your rate. The hourly feed doesn't report how many decks are listed at each price, so it can't tell how buying more would move the price.
What could happen
A jackpot is a card worth at least 5% of what your whole batch returns on average, so a single one moves the result. How many you draw mostly decides how the batch goes.
Each row is a number of jackpots with its exact chance, then the net profit of simulated batches that drew that many: unlucky (10th percentile), typical (median) and lucky (90th percentile).
Chance of profit comes from 4,096 repeatable simulated openings of the full card pool, one card per deck. Cards that count as 0 still drop but return nothing. Very small or very large chances show as less than 0.1% or more than 99.9%.
Every card is assumed to sell at its current price. Real results also depend on luck, moving prices and finding buyers.
Rare-card chances
Each card shows how rare it is (1 in N decks) and its chance to appear at least once in your batch: 1 minus (1 minus its chance), raised to your deck count. A 1-in-10,000 card has about a 63% chance in 10,000 decks, not a certainty.
More decks raise the chance of a rare hit, not the value of each deck. Paying more for extra decks can lower expected profit even as rare-card chances rise.