Nobody sees your guess.

The first private prediction market on Robinhood Chain. Call a Robinhood Chain asset above or below your price, stake USDG, and get paid when you are right.

built on

built on

built on

Predictors

Call NVDA, TSLA, SPY or any Robinhood token above or below a price by a deadline you choose. No public feed, no leaderboard, nobody trading against your call.

Yes / No Markets

Binary markets on Robinhood listings, token milestones and Robinhood Chain activity. Each side shows its multiplier before you stake a single USDG.

How it works

Positions settle on-chain at the deadline from live DexScreener prices. Winnings are claimable straight from the contract, in USDG, with no middleman.

built on

Robinhood Chain: the Arbitrum-based L2 where every market settles.

Arbitrum Orbit is the rollup stack Robinhood Chain runs on.

USDG, the Global Dollar, is the single stake and payout asset.

Paxos issues USDG and backs it with regulated dollar reserves.

DexScreener supplies the live Robinhood Chain prices that settle positions.

Ethereum secures Robinhood Chain as its settlement layer.

Foundry builds and tests the Probly market contract.

wagmi connects your wallet to the Probly app.

markets & features

Built for predictors who do not want an audience.

Private Positions

Robinhood Chain

No public feed or leaderboard. Only your wallet lists your calls

Private Positions

No public feed or leaderboard. Only your wallet lists your calls

Private Positions

No public feed or leaderboard. Only your wallet lists your calls

Fixed 1.8ร— Payout

Know the payout before you stake. A correct call pays 1.8ร—

USDG Stakes

Stake Global Dollar on Robinhood Chain, from 1 to 1,000 USDG

Stock & ETF Tokens

NVDA, TSLA, SPY, GLD and 50+ Robinhood tokens, priced live

Politics & Economics

Top Robinhood Chain DEX tokens, pulled live from DexScreener

Price Settlement

Positions settle at the deadline from live DexScreener prices

Yes / No Markets

Robinhood listings, chain activity and token milestones

Non-Custodial

Winnings claimable from the contract. Unsettled markets refund

Every other prediction market shows the crowd what you think before it resolves. This is the first one that does not.

Every other prediction market shows the crowd what you think before it resolves. This is the first one that does not.

Probly

Private prediction market on Robinhood Chain

products

Privacy at every step of the prediction.

how it works

Pick a Robinhood Chain asset, call above or below a price, choose the deadline and stake USDG. At the deadline the position settles against the live price.

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Predictions

Proofs

Sealed

Stake

Deadline

Target price

Payout

HIDDEN

your positions

Your calls live in your wallet's position list, not on a public board. No social feed, no copy trading, no crowd moving against you.

KNOWN PAYOUT

No odds that shift after you enter. A correct price call pays 1.8ร—, and every Yes/No side shows its multiplier before you stake.

ON-CHAIN SETTLEMENT

Positions settle from DexScreener prices for Robinhood Chain. Winnings are claimable straight from the contract, and markets that never settle refund your stake.

testimonials

I call NVDA above 200 by Friday close, stake 50 USDG, and nobody on a feed sees it. If I am right, 90 USDG lands in my wallet. Simple.

Stock token calls

Stock token calls

Above / below, 1.8ร— payout

Arbitrum Orbit is the rollup stack Robinhood Chain runs on.

wagmi connects your wallet to the Probly app.

Price calls on 50+ Robinhood stock, ETF and commodity tokens.

testimonials

I call NVDA above 200 by Friday close, stake 50 USDG, and nobody on a feed sees it. If I am right, 90 USDG lands in my wallet. Simple.

Stock token calls

Stock token calls

Above / below, 1.8ร— payout

Arbitrum Orbit is the rollup stack Robinhood Chain runs on.

wagmi connects your wallet to the Probly app.

Price calls on 50+ Robinhood stock, ETF and commodity tokens.

Start predicting on Robinhood Chain

Connect a wallet, stake USDG and make your first call in under a minute.

ยฉ 2026 Probly. All rights reserved.

Probly is experimental software. Prediction markets involve risk and you can lose your entire stake. Nothing on this site is financial advice. Probly is not affiliated with Robinhood Markets, Inc. Availability depends on local regulation.


Start predicting on Robinhood Chain

Connect a wallet, stake USDG and make your first call in under a minute.

ยฉ 2026 Probly. All rights reserved.

Probly is experimental software. Prediction markets involve risk and you can lose your entire stake. Nothing on this site is financial advice. Probly is not affiliated with Robinhood Markets, Inc. Availability depends on local regulation.


Start predicting on Robinhood Chain

Connect a wallet, stake USDG and make your first call in under a minute.

ยฉ 2026 Probly. All rights reserved.

Probly is experimental software. Prediction markets involve risk and you can lose your entire stake. Nothing on this site is financial advice. Probly is not affiliated with Robinhood Markets, Inc. Availability depends on local regulation.