Forex has its own vocabulary, and the jargon trips up almost everyone at the start. This glossary collects the core terms you’ll meet early, grouped so related ideas sit together rather than in alphabetical scramble. Each definition is kept short and practical, with the prop-trading angle noted where it matters. Use it as a quick reference while you read charts, place orders, or work through an evaluation, and come back to it whenever a term stops making sense.
A note on scope: this is a forex-focused glossary, so it leans on currency-pair examples. Futures has its own set of terms covered separately.
Market Basics
Forex. Short for foreign exchange, the global market for trading one currency against another. It’s the largest and most liquid financial market in the world.
Currency pair. Two currencies quoted against each other, such as EUR/USD. You’re always buying one and selling the other at the same time.
Base currency. The first currency in a pair. It’s the one you’re buying or selling, and the price tells you how much of the second currency one unit of it is worth.
Quote currency. The second currency in a pair, also called the counter currency. The price is expressed in this currency. In GBP/USD at 1.25, you need 1.25 US dollars to buy 1 British pound.
Exchange rate. The price of one currency in terms of another. It moves constantly with supply and demand, driven by economic data, interest rates, and sentiment.
Pip. The smallest standard unit of price movement in a pair, usually the fourth decimal place (the second decimal for JPY pairs). A move in EUR/USD from 1.2000 to 1.2001 is one pip.
Pip value. The cash value of a one-pip move, which depends on your position size. On a standard lot of 100,000 units, one pip is worth about $10; on a mini lot it’s about $1, and on a micro lot about $0.10.
Lot. A standardized trade size. A standard lot is 100,000 units of the base currency, a mini lot is 10,000, and a micro lot is 1,000. Lot size is how you scale risk per pip.
Appreciation. A rise in a currency’s value relative to another, so it buys more of the other currency than before.
Depreciation. A fall in a currency’s value relative to another, so it buys less than before.
Prices, Costs, and Conditions
Bid price. The highest price a buyer will pay, and the price you sell at. It sits just below the mid-market price.
Ask price. Also called the offer, the lowest price a seller will accept, and the price you buy at. It sits just above the mid-market price.
Spread. The difference between the bid and ask, and the built-in cost of a trade. You start every position down by the spread, since you buy at the ask and sell at the bid. Tighter spreads mean lower trading costs, which matters most for high-frequency strategies.
Quote. The current price at which a pair can be traded, typically shown as a bid and an ask together.
Liquidity. How easily an asset can be traded without moving its price. Major pairs are highly liquid; exotic pairs are thinner.
Volatility. The speed and size of price movement over a period. Higher volatility means bigger swings and more risk, and it tends to widen spreads.
Slippage. The difference between the price you expected and the price you actually got. It happens in fast or thin markets and can be positive or negative.
Swap (rollover). An interest adjustment applied to a position held past the daily rollover time, set by the interest-rate difference between the two currencies. It can be a charge or, less often, a credit.
Positions and Direction
Position. Your active exposure in a market, defined by its direction and size.
Long. A buy position that profits if the price rises.
Short. A sell position that profits if the price falls. You sell first and aim to buy back lower.
Open position. A trade that’s still active and exposed to the market, its value moving until you close it.
Close position. Exiting a trade by taking the opposite action to your entry, locking in the profit or loss.
Bullish. A positive outlook, expecting prices to rise. A “bull market” is a sustained uptrend.
Bearish. A negative outlook, expecting prices to fall. A “bear market” is a sustained downtrend.
Order Types
Market order. An instruction to trade immediately at the best available price. It guarantees a fill but not the exact price.
Limit order. An order to buy or sell at a specified price or better. It guarantees the price but only fills if the market reaches it.
Stop-loss order. A resting order that closes a trade once price hits a set level, capping your loss. When triggered, it becomes a market order, so the fill can slip in fast markets.
Take-profit order. A resting order that closes a trade at a target price to lock in a gain. As a limit order, it only fills if price trades through the level.
Stop-entry order. An order to enter a trade once price moves through a chosen level, used to join a move only after it confirms direction.
Open order. Any order placed but not yet filled, sitting in the market until it executes, is cancelled, or expires.
Execution. The actual filling of an order. An order is executed when it’s filled, not when it’s placed.
Leverage, Margin, and Account Terms
Leverage. The use of borrowed capital to control a larger position than your own funds would allow, often shown as a ratio like 30:1. It magnifies both gains and losses.
Margin. The deposit required to open and hold a leveraged position, set aside by your broker as collateral rather than charged as a fee.
Margin call. A warning that your account no longer holds enough margin to support open positions, prompting you to add funds or reduce exposure.
Liquidation. The forced closing of positions when losses erode the margin or breach a limit. In a prop account, breaching a loss rule can trigger automatic liquidation.
Carry trade. A strategy that holds a higher-interest currency against a lower-interest one to earn the positive swap, accepting the price risk of holding over time.
Drawdown. The drop from a peak in account value to a low point. In prop trading, your maximum drawdown is the loss threshold that ends an evaluation if breached.
Risk management. The practice of controlling potential losses, through position sizing, stop placement, and rules that cap exposure. It’s the core discipline behind passing a challenge, and our day trading risk management guide covers it in depth.
Portfolio. The collection of positions and instruments you hold, often spread across major, minor, and exotic pairs to diversify risk.
Chart and Analysis Basics
Candlestick chart. A chart where each candle shows the open, high, low, and close for a period. The body spans the open and close, the wicks mark the extremes, and color signals whether price rose or fell. The shapes form candlestick patterns traders read for clues.
Support. A price level where buying has historically been strong enough to slow or stop a fall.
Resistance. A price level where selling has historically been strong enough to cap a rise. Support and resistance are mapped with common indicators.
Trend. The general direction of price over time, up, down, or sideways. “The trend is your friend” reflects how many strategies aim to trade with it rather than against it.
Bottom Line
These are the terms you’ll bump into first, and knowing them turns a confusing platform into a readable one. The ones worth internalizing early are the cost and risk terms, spread, pip value, leverage, margin, drawdown, and slippage, because they decide how much a trade really costs and how quickly an account can get into trouble. Everything else builds on this base, so keep this page handy and the rest of the jargon will fall into place as you trade.
Frequently Asked Questions
What does pip mean in forex?
A pip is the smallest standard unit of price movement in a currency pair, usually the fourth decimal place (the second for JPY pairs). It’s how traders measure gains and losses, and its cash value depends on your position size.
What’s the difference between a lot and leverage?
A lot is the size of your trade, the number of currency units you’re trading. Leverage is the borrowed capital that lets you control that size with a smaller deposit. Lot size sets your risk per pip; leverage sets how little of your own money is tied up.
What’s the difference between the bid and the ask?
The bid is the highest price a buyer will pay and the price you sell at. The ask is the lowest price a seller will accept and the price you buy at. The gap between them is the spread, which is the cost of the trade.
Why do these terms matter for prop traders?
A prop evaluation is decided by costs and risk limits, so terms like spread, slippage, leverage, margin, and drawdown directly affect whether you pass. Understanding them helps you size positions correctly and avoid breaching the rules that end a challenge.