Docs

How Fourlong perpetuals work on BNB Chain.

Perpetual futures

A perpetual is a futures contract with no expiry. You post USDT as margin and take a leveraged long or short on the price of an asset. Every hour, a funding payment flows between longs and shorts to keep the contract close to the oracle price.

Margin & liquidation

Positions use isolated margin: each market has its own collateral, so a loss on one market can never touch another. A position is liquidated when its margin falls to the maintenance requirement of 0.5% of notional. For a long, the liquidation price is entry × (1 − 1/leverage + 0.005).

Fees

Oracle

Mark prices follow a median of external spot and perp venues. When the oracle can't be reached, this testnet build falls back to a local price simulator; the status dot in the sidebar shows which source is active.

Markets

Testnet

This build runs in testnet mode: connecting creates a local BNB Chain test account funded with 10,000 test USDT, and all positions are stored in your browser. No real funds move.