Fomo Rails Documentation

How it works

Everything you need to know about Fomo Rails — the 5-minute memecoin prediction market on Robinhood Chain. Powered by DexScreener and Uniswap.

Overview

Fomo Rails is a binary prediction market built on Robinhood Chain. You predict whether a memecoin's price will go UP or DOWN over a 5-minute window. If your prediction is correct, you win a proportional share of the total bet pool.

Markets are created automatically every 30 seconds from live token launches indexed by DexScreener across Robinhood Chain's DEXes, including Uniswap. You can also manually create a market for any token by searching its contract address.

5-Min Windows
Real ETH Prizes
No KYC
Live Price Data
Any Token
Auto-Resolution
Robinhood Chain
Fomo Rails runs on Robinhood Chain — an EVM-compatible Arbitrum Orbit L2 (chain ID 4663) purpose-built for tokenized assets. Token price data is sourced from the DexScreener API, covering every DEX indexed on the chain.

Getting Started

You can be placing your first prediction in under 60 seconds. Here's how:

1
Connect your wallet

Click "Connect Wallet" in the top navigation. Fomo Rails supports MetaMask, Coinbase Wallet, and any wallet via Privy. You can also sign in with a social account to create an embedded wallet.

2
Fund your wallet with ETH

Make sure you have ETH available on Robinhood Chain. The minimum bet is 0.001 ETH — bet any amount above that. You can deposit by scanning the QR code shown in the wallet panel after connecting.

3
Find an active market

Go to the Markets page (/app). Browse active prediction markets or use the token search bar to find a specific token by its contract address.

4
Place your prediction

Click a market card to open it. Choose UP or DOWN, enter your ETH bet amount, and confirm the transaction in your wallet. You're in!

5
Wait for resolution

The countdown timer shows how much time is left. When it hits zero, the market resolves automatically. Winners receive their payout directly to their wallet within seconds.

Embedded Wallets
If you log in with a social account, Privy creates an embedded wallet for you automatically. You can fund it by sending ETH to the address shown in your wallet panel.

How Markets Work

Every prediction market on Fomo Rails follows the same lifecycle:

Created
Opening price recorded, market opens
Active
5-min betting window is open
Resolving
Final price fetched from oracle
Resolved
Winners paid out automatically

Market Creation

  • ▸Automatic — Every 30 seconds, Fomo Rails scans DexScreener for new Robinhood Chain token launches and creates markets automatically. No action needed.
  • ▸Manual — Any user can create a market for any token by searching its contract address in the search bar on the Markets page.
  • ▸Each market records an opening price at creation time using the DexScreener price oracle.

Resolution Logic

  • ▸When the 5-minute window expires, the engine fetches the final price from the oracle.
  • ▸Final price > opening price → UP bettors win
  • ▸Final price < opening price → DOWN bettors win
  • ▸Final price = opening price → All bets refunded (rare tie)
  • ▸Oracle failure → Market cancelled, all bets refunded

Placing Bets

One Bet Per Market
You can only place one bet per wallet per market. Once placed, bets cannot be changed or cancelled. Choose your direction carefully.

Directions

UP

You predict the token price will be higher than the opening price when the 5-minute window closes.

DOWN

You predict the token price will be lower than the opening price when the 5-minute window closes.

Bet Limits

0.001 ETH
Minimum Bet
No limit
Maximum Bet
1 per wallet
Bets / Market

Payout Calculation

Fomo Rails uses a parimutuel betting model — losing bets fund the winning pool. Payouts are proportional to your share of the winning side.

Payout formula
your_payout = (your_bet / total_winning_pool) × total_pool × (1 − house_fee)
house_fee = 0.02 (2%)

Worked Example

Total UP pool0.5 ETH
Total DOWN pool0.3 ETH
Total pool0.8 ETH
Your UP bet0.1 ETH
Price went UP — you win!
Calculation(0.1 / 0.5) × 0.8 × 0.98
Your payout0.1568 ETH (+56.8%)
House Fee
A 2% fee is deducted from the total pool before payouts are distributed. This fee funds Fomo Rails development and ongoing operations.
Edge Case: One-Sided Market
If all bets are on the same side and the losing side has zero bets, winners receive their original bet back (no profit possible from an empty opposing pool).

Price Oracle

Fomo Rails sources price data from DexScreener, which aggregates every DEX indexed on Robinhood Chain (Uniswap and others) into a single deepest-liquidity price per token.

DexScreener

For each token, Fomo Rails takes the DEX pair with the most liquidity and reads its native price. Real-time, free, and no API key required.

  • ▸Price is read from the deepest-liquidity pair for the token, across every DEX on the chain.
  • ▸If no pair with liquidity is found, the market is cancelled and all bets are refunded.

Supported Tokens

Any Robinhood Chain token with an active price feed can have a prediction market on Fomo Rails.

  • ▸Any Robinhood Chain token — Search any contract address. If a price feed exists on DexScreener, a market can be created.
  • ▸Deep liquidity preferred — Tokens with an active Uniswap (or other DEX) pair on Robinhood Chain have the most reliable prices.
Liquidity Requirement
A token must have sufficient liquidity and an active price feed for a market to be created. Very new tokens or tokens with no DEX liquidity may not have a price feed. If you search for a token with no feed, Fomo Rails will show an error.

FAQ

You're ready to play

Connect your wallet and make your first 5-minute prediction.

Launch App