Skip to content
Beta Release: JK Index is in active development. Data coverage is expanding and you may see gaps or inconsistencies as we iterate. Feedback is welcome.

PSA reveal prediction

Before the Slab

Before the Slab asks one question: what PSA grade will this card receive? Inspect owner evidence, practice the market flow, and join the collector read before the final PSA result is revealed.

Practice $JKB only — simulated, no cash value. The final PSA result resolves each event. JK Index is not affiliated with or endorsed by PSA.

View preview cardsLeaderboard

New to BTS? Read the full guide →

PRACTICE SIGNAL

Featured read appears when a card is selected.

Preview of how BTS practice picks form a public collector read.

Awaiting first read

BTS practice read

Past practice readMega Charizard Y ex

Past practice activity · 36 community reads. Past practice reads from earlier BTS previews — these are read-only and do not settle. New events open from the queue.

Preview of how the collector read appears as picks come in.

Select a featured BTS event to see the collector read.

Market lobbyPast practice events

Past practice reads from earlier BTS previews

These are read-only and do not settle.

  • Mega Charizard Y exLegacy practiceRead-onlyDoes not settlePast practice activity · 36 community reads
  • Sett - BrawlerLegacy practiceRead-onlyDoes not settlePast practice activity · 6 community reads
  • Nami OP15-086Legacy practiceRead-onlyDoes not settlePast practice activity · 6 community reads

Collector pulse

Collector pulse

Activity appears here when collectors record public BTS positions.

Activity appears here when collectors record public BTS positions.
Cards with evidence soonMarkets open soonEvent discussion ready

BTS practice activity is public by default. $JKB has no cash value. JK Index is not affiliated with or endorsed by PSA; grade names are used for collector reference only.

Live board

Browse open and past PSA reveal practice markets — Showing 0.

Past practice events

Earlier community reads from BTS preview events. These are read-only and do not settle.

  • Past practice eventLegacy practiceRead-only

    Mega Charizard Y ex

    Past practice activity · 36 community reads

    Archived practice event

  • Past practice eventLegacy practiceRead-only

    Sett - Brawler

    Past practice activity · 6 community reads

    Archived practice event

  • Past practice eventLegacy practiceRead-only

    Nami OP15-086

    Past practice activity · 6 community reads

    Archived practice event

How it works

How it works

Practice $JKB only. No cash value, no withdrawals, and no redemption into marketplace funds. Every read you make builds a public track record on your collector profile.

Step 1

Pick an outcome

Use practice $JKB to make a practice prediction on the card's final PSA bucket.

Step 2

Preview, then trade

Quote preview is read-only; confirmed trades record your read and can move the market.

Step 3

Settle deterministically

Reviewed evidence settles PSA 1-8 to PSA 8 or lower, PSA 9, PSA 10, or No Numeric Grade. Void/refund is reserved for invalid markets, not terminal no-numeric PSA results.

Why Before the Slab exists

Why Before the Slab exists

Raw-card speculation already happens in DMs, group chats, and comment sections. Before the Slab gives that behavior a public surface: evidence, community picks, discussion, activity, and a final reveal.

The goal is not to predict for collectors. The goal is to make the collector read visible before the slab comes back.

Join the collector read

Want to join the first BTS markets?

Create an account to claim practice $JKB, inspect preview events, and follow the collector read as it forms.

Preview an eventView account