FairValue

Checking model

Esc

  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
  • EnvironmentTerminalExplore, compare and track players; market, league and model views.
  • EnvironmentStoriesValuations, head-to-heads and research findings, told as stories.
  • TerminalPlayer ExplorerSearch, filter and sort the player export.
  • TerminalComparison StudioTwo to four players on one scale.
  • TerminalWatchlistsNamed collections, kept in this browser.
  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

↑ ↓ to move · Enter to open · Esc to closeLoading player index…

Arbnor

Muja

RWAlbania · Sint-Truidense VV

№ 606967Established €2.4M +0.04

Player dossierPro League

ArbnorMuja

RWRight WingerAttack

Club
Sint-Truidense VV
League
Pro League
Nationality
Albania
Age
27
Height
179 cm
Foot
Right
Valued
4 Jun 2026

Reading the valuation

The market values Muja at €2.5M. Model A, which never saw Muja during training, estimates €2.4M: the market value is 4% above that estimate.

That is a factor of ×1.04. Model A's typical held-out miss is ×1.50 either way, so this gap is within its usual error.

Without league and club, Model B estimates €3.2M, further from the market. Model B is usually further off (typical miss ×2.07): league and club explain much of how the market prices players.

A gap describes the model's arithmetic for this player's inputs, not what the player is worth.

▲ +0.04A €2.4M▼ −0.25B €3.2M
Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).
Apps
62
Minutes
3,140
Goals
9
Assists
3
Started
34/62
Min / app
51
Cards
7Y 0R

Club matches, two years to the valuation date

The Valuation Journey

What moves Model A

Asking the prediction API to explain Model A for Muja…

SHAP describes the model's arithmetic for this player's inputs, not what causes market value. Model B can be explained only by the live service; Model A also has a published explanation for the research players.

Model A vs Model B against the observed €2.5M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €2.5MModel A €2.4M

Asking the prediction API…

Held-out estimates come from cross-validation, with this player outside the training data: the honest comparison. Served models were refitted on every player, this one included, so they sit closer to the market. Shaded band: Model A's typical miss (×1.50 either way).

Player traitspercentiles vs 1,583 attackers

Arbnor Muja's percentiles among attackers: Goals per 90 49th, Assists per 90 26th, Minutes, two years 68th, Starts 43rd, Minutes, last 365 days 71st, European club minutes 57th49thGoals26thAssists68thMinutes43rdStarts71stRecent57thEurope

Dashed ring: the attacker median (50th percentile)

Minutes, last 365 days

Club minutes in the final year of the window: recent involvement, or the absence of it.

1,930 this player1,301 attacker median71st percentile

0peer deciles · median line · this player ●4,703

No passing, progression or defensive actions exist in the dataset, so no trait claims to measure them.

Valuation history every Transfermarkt valuation on record

First valuation
€50k
Jan 2020
Peak
€5M
Dec 2023
Model target
€2.5M
Jun 2026
Valuations
21
5 club changes
Jun 2026€2.5MSint-Truidense VVValuation the model is trained to reproduce

Jun 2026: €2.5M, Sint-Truidense VV. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2020-01-02€50kKF Skënderbeu
2020-11-17€50kKF Trepca 89
2021-01-05€75kKF Trepca 89
2021-06-06€100kKF Trepca 89
2021-12-19€225kFC Drita
2022-06-12€250kFC Drita
2022-09-07€350kRoyal Antwerp FC
2022-11-04€500kRoyal Antwerp FC
2023-03-22€1.5MRoyal Antwerp FC
2023-06-09€2.5MRoyal Antwerp FC
2023-10-23€4MRoyal Antwerp FC
2023-12-19€5MRoyal Antwerp FC
2024-03-15€4.7MSamsunspor
2024-05-31€4.5MSamsunspor
2024-10-04€4MSamsunspor
2024-12-23€3.7MSamsunspor
2025-03-20€3.5MSamsunspor
2025-06-18€3.4MSamsunspor
2025-10-01€3MSint-Truidense VV
2025-12-10€2.2MSint-Truidense VV
2026-06-04€2.5MSint-Truidense VV

Audit context group-level, not about this player

Audit group
UEFA
Population gap, Model A
+0.093 95% CI +0.063 to +0.124
This player, market vs held-out A
+0.037

The group comes from first-listed citizenship and is never a model input. Across the population, non-UEFA players' market values sit about 10% above Model A's held-out estimates, relative to UEFA players in the same leagues. One player's residual says nothing about that pattern (typical miss ×1.50), and none of it is evidence of discrimination: the target may itself be biased. Open the Fairness Audit

In context observed value among comparable players in this build

All players in the Terminal →

Pro League350 players · median €1.8M

Valued above 60% of the 350 Pro League players.

€100k€750k€5M€30M€2.5MSee them in the Explorer →

Attackers, all leagues1,583 players · median €2.5M

Valued above 48% of the 1,583 attackers.

€20k€300k€5M€75M€2.5MSee them in the Explorer →

Where Muja appears

Watchlists and the comparison tray are kept in this browser only.

Near this valuation closest observed values: same league, then same position

Counts and ranks of observed Transfermarkt values only; model errors are never ranked here. Full player export: Every player in the modelling population (D-011).