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…

Henry

Cartwright

DMEngland · Falkirk FC

№ 866651Emerging €430k −1.05

Player dossierPremiership

HenryCartwright

DMDefensive MidfieldMidfield

Club
Falkirk FC
League
Premiership
Nationality
England
Age
21
Height
175 cm
Foot
Right
Valued
20 May 2026

Reading the valuation

The market values Cartwright at €150k. Model A, which never saw Cartwright during training, estimates €430k: the market value is 65% below that estimate.

That is a factor of ×2.87. Model A's typical held-out miss is ×1.50 either way, so this gap is larger than its usual error.

Without league and club, Model B estimates €922k, 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.

▼ −1.05A €430k▼ −1.82B €922k
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
32
Minutes
1,138
Goals
1
Assists
0
Started
11/32
Min / app
36
Cards
3Y 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 Cartwright…

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 €150k

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €150kModel A €430k

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 1,687 midfielders

Henry Cartwright's percentiles among midfielders: Goals per 90 48th, Assists per 90 8th, Minutes, two years 17th, Starts 7th, Minutes, last 365 days 37th, European club minutes 30th48thGoals8thAssists17thMinutes7thStarts37thRecent30thEurope

Dashed ring: the midfielder median (50th percentile)

Goals per 90

Club goals per 90 minutes played in the two years to the valuation date.

0.08 this player0.08 midfielder median48th percentile

0.00peer deciles · median line · this player ●0.93

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
Oct 2025
Peak
€150k
May 2026
Model target
€150k
May 2026
Valuations
3
0 club changes
May 2026€150kFalkirk FCValuation the model is trained to reproduce

May 2026: €150k, Falkirk FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2025-10-08€50kFalkirk FC
2025-12-10€50kFalkirk FC
2026-05-20€150kFalkirk FC

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
−1.053

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 →

Premiership311 players · median €400k

Valued above 18% of the 311 Premiership players.

€20k€150k€1M€7.5M€150kSee them in the Explorer →

Midfielders, all leagues1,687 players · median €2M

Valued above 2% of the 1,687 midfielders.

€20k€200k€2M€20M€150kSee them in the Explorer →

Where Cartwright 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).