The Prop Trader's Dictionary

From drawdown rules to payout splits — every term you need to understand, master, and pass your challenge.

A

Account Size

Account size refers to the total amount of capital available in a trading account. It determines how much a trader can risk per trade, the position sizes they can take, and their overall exposure to the market. In both personal and funded trading, account size plays a key role in shaping risk management and trading strategy decisions.

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Average True Range

Average True Range (ATR) is a technical indicator that measures market volatility by calculating the average range between high and low prices over a specific period. It does not indicate direction but shows how much an asset typically moves. Traders use ATR to understand current market conditions and adjust their risk management accordingly.

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Arbitrage

Arbitrage is the practice of simultaneously buying and selling the same asset across different markets to profit from price discrepancies. It relies on the fact that the same asset can be priced differently in different exchanges or regions at the same time. Arbitrage opportunities are typically short-lived, as markets tend to correct themselves quickly.

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3+ terms

Explore all glossary terms currently grouped under the letter "A".