How Rotility works

RTV (Recent Trade Value)RTV

Rotility’s value for an item. It starts from every real sale on the Roblox market: a median of daily prices, newer sales counting more, over the last two weeks (widening up to six months for items that rarely sell). Rotility’s valuation AI then checks thin, projected and manipulated items against tracked trades, community polls and value proofs, and adjusts the value where they disagree.

Value

What totals and inventories use: the RTV, or the RAP for an item that has no RTV yet.

USD valueUSD

The value in US dollars (or the currency you pick at the bottom of any page): always the value times a rate, in dollars per R$ 1K, for items like it by rarity, demand and size. Rates come from real-money sales on resale shops, scaled down to what people pay each other, and are checked by staff. If an item’s dollars look wrong, it’s the RTV or the rate that changes. A reference, not a price or an offer. USD values and dollar sales

RAP (Recent Average Price)

Roblox’s own running average of resale prices. A few self-bought sales can push it far above what an item really sells for, which is why Rotility leads with RTV.

Best price

The cheapest copy for sale on Roblox right now, from a sweep that runs every few seconds.

vs RTV

How far the best price sits below the RTV. A copy listed under its RTV is a deal, and lands on the deals page.

Weekly change▲12% ▼6.1%

RTV now against RTV a week ago, from sales alone, so an adjustment never reads as a market move.

Confidence

How much evidence stands behind an RTV. Three bars: 15 or more sales within 30 days. Two: 6 or more within 90 days. One: fewer. Thin markets are flagged, not hidden.

Demand

How readily an item sells for its price: its sales over the last 30 days against what’s normal at that price (a R$ 1K item sells hundreds of times a month, a R$ 1M item a handful), or against its supply for rare items. Amazing, High, Normal, Low or Terrible.

Market cap

Value times the number of copies. Summed over every item for the whole market.

Projected

RAP sits at least 25% above the RTV (the bar rises for the biggest items, which sell rarely), with at least three recent sales behind the RTV. Don’t trade on its RAP.

Manipulated

Sales or trades that look staged: one-copy sales far above the usual price (someone buying their own listing to pump RAP), or the same accounts passing copies back and forth when that makes up a real part of what the item sells and trades. It’s judged against the item’s market, so a trade-back or a few odd deals on an item that sells every day don’t count. Staged sales and trades don’t count toward the value.

Adjusted value

An RTV set by Rotility’s valuation AI, on its own or as an assisted valuation, instead of the plain sales figure, with a note saying why. The AI re-checks its own values regularly and updates them as the evidence changes.

Community value

The result of a value poll in the Rotility Discord. One input among many, shown on the item page.

ROBLOX Tablets

Each “name’s ROBLOX Tablet” is a one-of-a-kind item, but they all get the same offers, so they share one value. A tablet named after a well-known developer or player is valued on its own, from that shared value up.

Limited

A classic Roblox limited: it went off sale and now only trades and resells between players.

Limited U

A limited with a fixed number of copies, each with its own serial number.

Collectible

Roblox’s newer limiteds (Limiteds 2.0), resold on the Marketplace. Rotility covers the Roblox-made ones, limited heads included.

Copies

How many copies of an item exist. Rotility counts them from Roblox’s owners lists.

Rarity

Semi-rare: under 500 copies. Rare: under 125. Ultra rare: 25 or fewer. 1 of 1: a single copy. Unobtainable: no player can get a copy, because Roblox has trading and resale turned off for the item or Roblox's own account holds every copy.

Serial (#)

A copy’s number, for items that number their copies. Low serials often trade at a premium.

Copy (UAID)

Roblox’s id for one specific copy. Every copy page shows who owns it now and every move Rotility has seen.

Heads

Since Roblox moved to dynamic heads, limited faces and heads are bundles. Rotility values and tracks them like any other limited.

Stacked (×3)

Several copies of one item in an inventory, shown as one card. Click it to pick a copy.

On hold

A copy bought very recently. Roblox doesn’t let it be traded for a few days.

Inventory value

The value of every limited a player owns, from their latest scan (public inventories, or one shared from the Rotility hangout).

Rank

Where an inventory sits on the leaderboard by value.

Outfit value

What the limiteds a player is wearing right now are worth.

Trade

In one scan window a player both gave and got copies. Trades are dated by the window between the two scans that saw them.

The other side

Who a player traded with, found right away from Roblox’s owners lists: who holds the copies that left now, and who held the ones that came. That player is tracked from then on. A copy whose holder Roblox hides shows as a private inventory.

Bought, sold, bought listing

Copies only arrived (a purchase, or a trade with someone Rotility doesn’t follow) or only left (a sale). Between two tracked players a Roblox trade needs an item on each side, so a one-way move is a bought resale listing (Rotility saw it listed), a trade whose other side we can’t see (several items at once, often into a private inventory), or, for a single copy nobody saw listed, either one.

Mass trade

A deal too big for one Roblox trade (4 items a side): copies moving between the same two tracked players within two days count as one. Many items for one overpay by count, so lopsided trades like 8 for 1 count for less in values.

Unbalanced trade

The smaller side worth under 40% of the bigger one (and the bigger side worth R$ 1,000 or more). Big deals and rares get a little more room, as a rare's value often lags what it fetches: the bar eases to 36% for the biggest deals and 33% with a rare in them. Robux or dollars may have been added off the books, or one item is being hyped, so it counts for less in values until that price becomes the norm.

Private inventory

Hidden on Roblox. Rotility shows only the copies it has seen elsewhere (listings and owners lists), or what the owner shares from the hangout.

Opting out

Players can stop Rotility from tracking them from their own player page.

• WatchAdds an item or player to your watchlist, the bookmarks button at the top.
• WishlistItems you want; shown on your player page and in trade ads.
• DealsCopies listed below their RTV right now.
• Trade calculatorWeighs both sides of a trade by RTV and RAP.
• Trade adsWhat players offer and want, checked against their inventories.
• Copy historyEvery owner of one copy.
• Stack copiesShows several copies of one item as one card.
• 3DHover an item or avatar picture with a mouse to turn it in 3D.
• ProtilityRotility’s paid plan; members show a Protility badge.
• SniperProtility alerts for copies listed at or under your price.
• Daily reportHow your limiteds did since yesterday (Protility).
• CopyCopies an id or link to your clipboard.

Roblox

Catalog, resale history, listings, inventories, owners lists, avatars and thumbnails, read from Roblox’s own services within their rate limits.

Tracked inventories

Rotility scans the inventories of thousands of traders and compares scans to see trades as they happen.

The community

Value polls and value proofs from the Rotility Discord, read as evidence by the valuation AI.

Rolimon’s

Inventory history for value charts from before Rotility followed a player, imported with permission. For items that rarely sell, the value changes Rolimon’s publishes are one input to the valuation AI.

More on the project on the about page, and how it compares on the comparison page. Rotility isn’t affiliated with Roblox.