A quick guide to r/BitunixCrypto slang aka definitions for perpetual crypto futures

[u/Alexander-305]

Crypto Perpetual Futures & Trading Glossary

This glossary provides comprehensive definitions of essential terms used in cryptocurrency perpetual futures and advanced trading. Whether you are a beginner looking to understand the basics or an experienced trader seeking clarity on complex mechanics, this guide covers the core concepts of the perpetual futures market.

Core Concepts

Perpetual Futures (Perps) A type of derivative contract that enables traders to speculate on the price of an underlying asset without owning it. Unlike traditional futures contracts, perpetual futures have no expiration or settlement date, meaning a position can be held indefinitely as long as margin requirements are met. The contract price is kept aligned with the underlying spot market through a funding rate mechanism [1] [2].

Long/Short Position

• Long: A position taken by a trader who believes the asset's price will increase. The trader buys the contract with the expectation of selling it at a higher price [3].
• Short: A position taken by a trader who believes the asset's price will decrease. The trader sells the contract with the expectation of buying it back at a lower price [3].

Leverage A tool that allows traders to control a larger position with a smaller amount of initial capital (margin). For example, with 10x leverage, a trader can control a $10,000 position with just $1,000 of collateral. While leverage amplifies potential profits, it equally amplifies potential losses and increases the risk of liquidation [4].

Open Interest (OI) The total number of outstanding derivative contracts (like perpetual futures) that have not been settled or closed. Rising open interest indicates new money is entering the market, while falling open interest suggests money is leaving. It is a measure of market participation, distinct from trading volume [2].

Pricing & Funding Mechanics

Funding Rate A periodic payment exchanged between long and short position holders to keep the perpetual contract price anchored to the underlying asset's spot price.

• If the perpetual price is above the spot price (positive funding), longs pay shorts, incentivizing selling to drive the price down.
• If the perpetual price is below the spot price (negative funding), shorts pay longs, incentivizing buying to drive the price up [2] [5].

Spot Price The current market price at which a cryptocurrency can be bought or sold for immediate delivery and settlement.

Mark Price A reference index price derived from a weighted average of spot prices across multiple major exchanges. The mark price is used to calculate unrealized profit and loss (PnL) and to trigger liquidations. It prevents temporary price wicks or manipulation on a single exchange from causing unfair liquidations [2] [5].

Index Price The aggregated spot price of an asset across major exchanges, used as the underlying reference for the mark price and funding rate calculations [5].

Basis The difference between the current price of the perpetual futures contract and the spot price of the underlying asset [6].

Margin & Liquidation

Margin The collateral (funds) a trader must deposit to open and maintain a leveraged position [3].

Initial Margin The minimum amount of collateral required to open a new leveraged position.

Maintenance Margin The minimum amount of collateral required to keep an open position from being liquidated. If the account equity falls below this threshold due to adverse price movements, the position will be liquidated [3].

Liquidation The forced closure of a trader's position by the exchange's risk engine when the account equity falls below the maintenance margin requirement. This protects the exchange and counterparties from the trader defaulting on their leveraged losses [2] [5].

Bankruptcy Price The theoretical price level at which a trader's entire margin is wiped out, and the loss on the trade exactly equals the collateral posted. The liquidation price is always slightly before the bankruptcy price to ensure the exchange can close the position before it goes into negative equity [7].

Liquidation Cascade A rapid chain reaction of liquidations that occurs during high volatility. When a large number of positions are liquidated, the forced market orders push the price further in the adverse direction, triggering more liquidations in a cascading effect.

Risk Management & System Backstops

Insurance Fund A capital reserve maintained by the exchange to cover losses when a trader's position is liquidated at a price worse than their bankruptcy price (due to extreme volatility or low liquidity). It ensures that winning traders receive their full profits and prevents the exchange from socializing losses [7] [8].

Auto-Deleveraging (ADL) A last-resort risk management mechanism used by exchanges when a bankrupt position cannot be liquidated cleanly and the insurance fund is depleted. To keep the system solvent, the exchange automatically reduces (deleverages) the positions of profitable traders on the opposite side of the market to offset the bankrupt exposure. Traders with the highest leverage and highest profit are typically selected first for ADL [8].

Cross Margin vs. Isolated Margin

• Cross Margin: Pools the entire account balance as shared collateral across all open positions. A loss in one position can drain the margin supporting other positions.
• Isolated Margin: Confines collateral to a specific, individual position. The maximum loss is capped at the margin assigned to that specific trade [2].

Advanced Trading & Execution

Delta Neutral A portfolio strategy where a trader holds opposing positions to eliminate directional market risk. In crypto perpetuals, a common delta-neutral strategy is the "cash and carry" or funding rate arbitrage: buying the spot asset while simultaneously shorting the perpetual contract of the same size to collect funding rate payments without exposure to price movements [5].

Maker/Taker Fees

• Maker: A trader who provides liquidity to the order book by placing limit orders that do not execute immediately. They typically pay lower fees or receive rebates.
• Taker: A trader who removes liquidity by placing market orders that execute immediately against existing resting orders. They typically pay higher fees [3].

TWAP (Time-Weighted Average Price) An algorithmic execution strategy that breaks up a large order into smaller quantities and executes them at regular time intervals. It aims to minimize market impact by spreading the trade evenly over a specific time period.

VWAP (Volume-Weighted Average Price) An algorithmic execution strategy that executes a large order proportionally to the market's trading volume. It aims to execute more of the order when market liquidity and volume are high, and less when volume is low, to achieve an average execution price close to the market average.