NEW — now tracking 1,000+ singles across 4 games. Always free. →
FREE · SEALED + SINGLES · POKEMON · ONE PIECE · LORCANA · RIFTBOUND

Know when to buy.
And when to hold.

ChopArm turns live prices and eBay supply into buy, watch, and trim signals for sealed boxes and singles across four games — each one explained in plain English, so you know the why, not just the score.

Launch the dashboard → See the track record
100% free · no account required · no credit card
choparmanalytics.com/app · Dashboard LIVE
1
BUY SETUP
18
ON WATCH
1,053
TRACKED
buy setup
Spiritforged
Riftbound · sealed
$149▲ 7.8%
watch
Pikachu ex 179
Pokemon · single
$72▲ 4.8%
trim
Winterspell
Lorcana · sealed
$213▲ 69.9%
4games covered
53sealed boxes
1,000+singles tracked
$0forever
WHAT YOU GET
Sealed and singles. One platform.

Sealed buy signals

A 0–10 buy / watch score on every sealed box, from price trend, supply, and set-value.

Singles signals · 4 games

Buy, watch, and trim signals on 1,000+ singles — Pokemon, One Piece, Lorcana, Riftbound.

Supply + forecasts

eBay supply tracking and projected price cones with a published forecast track record.

Plain-English why

Every signal comes with a short story of what's driving it — not just a number.

Compare tool

Put two products side by side and see which the data actually favors.

Track record

Every signal's outcome published — the whole ledger, not a highlight reel.

HOW IT WORKS
Data in. Signal out.
01

Prices and supply, tracked

Live market prices and eBay listing counts, refreshed twice a week across every box and single.

02

Scored into a signal

Price trend, supply, and set-value combine into a 0–10 buy, watch, or trim.

03

Explained in plain English

Read the story behind the score, check the forecast, and make the call yourself.

TRACK RECORD
We publish the whole ledger.

No cherry-picked hit rate. Every signal we've ever fired is scored against what the price actually did next — wins and misses.

Liveupdated each scan
Both sidessealed + singles
Forecast errorpublished, not hidden
PRICING
Free today. More coming.
FreeEVERYTHING, NOW
$0
forever · no account needed
  • Full dashboard
  • Sealed + singles signals
  • Track record + compare
  • Search + plain-English narratives
  • Twice-weekly data
Launch the dashboard →
ProCOMING SOON
get in early · be first to know
  • Instant email + Discord alerts
  • Live first-look — no delay
  • Full singles universe + filters
  • Forecast price bands
  • Graded (PSA / BGS) signals — soon
Make your next buy a confident one.

Open the dashboard — it's free, no signup — or drop your email above for Pro alerts when they land.

Launch the dashboard →
FAQ
Common questions
Is this financial advice?

No. ChopArm is an informational tool that tracks quantitative price and supply signals from public marketplace data. Nothing here is financial, investment, or trading advice. Past signal performance does not guarantee future results — always do your own research.

Is it really free?

Yes. The full dashboard — sealed and singles signals, track record, compare, and search — is free with no account. A Pro tier with alerts and live first-look data is coming later; join the waitlist to hear first.

What does it cover?

Sealed boxes and 1,000+ singles across Pokemon, One Piece, Lorcana, and Riftbound. Prices and eBay supply refresh twice a week.

Where does the data come from?

Live market prices and eBay active-listing supply. Signals combine price trend, supply contraction, and set-value into a transparent 0–10 score, with the reasoning shown in plain English.