f foilPUBLIC PREVIEW◈ SIMULATION ONLY

A LITTLE PRACTICE. A DIFFERENT PERSPECTIVE.

Trade the idea.
Keep the capital.

Explore BTC and ETH with a practice portfolio.
Real market observations. Entirely simulated trades.

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No money moves here. No wallet, deposits or signatures. All positions and returns are simulated.

SIMULATION ONLY · Prices are indicative Lighter observations or labeled generated demo prices. Every entry, exit and PnL is simulated; no price is an executable quote.

BTC / USD · INDICATIVE MIDPOINT

Waiting for price

Connecting
Session priceLighter · observations since opening this page

Waiting for fresh market observations.
You can explore the offline demo while the feed is unavailable.

Connecting to Lighter…Read-only market data

YOUR PRACTICE DESK

Room to experiment.

Live-price simulation · saved in this tab

Practice, with perspective. PnL is a simplified linear estimate, rounded to cents. Losses are capped at margin. Positions may be simulated as liquidated at 5% maintenance margin while this page is running. Feed gaps and closed tabs are not backfilled.

Practice data survives refresh in this tab. Closing the tab may clear it. Nothing here is a claim on assets, a protocol deposit, or a promise of execution.

A practice space, not a trading account.

Foil's public preview lets you simulate BTC and ETH long or short positions with $10,000 in virtual cash and 1–10× leverage.

Live mode uses indicative Lighter bid/ask midpoints. Quotes older than ten seconds block simulated opening and closing. Offline demo uses generated prices and a separate portfolio.

PnL is linear, with no fees, funding, profit haircut, FIFO claims or token rewards. This simulation does not reproduce the smart contracts. It does not establish that real-money trading or liquidation is safe.

Positions are evaluated only while this page runs. After reconnecting, only the next valid observation is used; missed market moves are unknown.

Start a fresh practice session?

This clears this mode's positions and history, and restores $10,000 of virtual cash.