Order Types · Forex Glossary
Partial Fill — Definition & Meaning in Forex Trading
A clear, practical definition of partial fill written for EU retail forex traders.
Quick Answer
Partial Fill: When only a portion of an order is executed at the requested price due to insufficient liquidity at that level. The remaining unfilled portion may be filled at the next available price or cancelled, depending on the order type and broker settings.
What does Partial Fill mean?
Partial Fill is a order types concept every forex trader should understand. When only a portion of an order is executed at the requested price due to insufficient liquidity at that level. The remaining unfilled portion may be filled at the next available price or cancelled, depending on the order type and broker settings. Traders encounter partial fill throughout day-to-day decision-making, and a solid grasp of the idea helps avoid costly mistakes — especially for EU retail traders operating under ESMA rules where leverage caps, negative balance protection, and investor compensation schemes all intersect with practical trading concepts like this one.
How is Partial Fill used?
In practice, Partial Fill is an execution feature built into every mainstream retail trading platform, from MetaTrader 4 and MetaTrader 5 through to cTrader and proprietary broker terminals. You select partial fill in the order ticket when opening or modifying a position. Active traders rely on partial fill to automate both entries and exits without needing to monitor the market continuously.
Example
For example, a trader anticipating a breakout above 1.1000 on EUR/USD might use partial fill to automatically enter long the moment price crosses the level, avoiding the need to watch the chart in real time. If the breakout never occurs, the order simply expires unfilled.
Related Terms
Other order types concepts worth knowing.
Fill
The execution of an order. A fill occurs when a broker matches your order at a specific price. Partial fills happen when only part of the order is executed.
Limit Order
An order to buy or sell at a specified price or better. A buy limit is placed below the current price; a sell limit is placed above. The order will only fill at the limit price or a more favorable one.
Market Order
An order to buy or sell immediately at the best available price. Market orders guarantee execution but not a specific price, especially in fast-moving or illiquid markets.
Stop Loss
An order placed to close a position at a predetermined price to limit losses. Once the price reaches the stop level, the order becomes a market order. Stop losses are a cornerstone of risk management.
Take Profit
An order placed to automatically close a position when the price reaches a specified profit target. Take profit orders lock in gains and remove the need to manually monitor open positions.
Trailing Stop
A dynamic stop loss that moves with the market price by a set distance. As the price moves in your favor, the stop follows; if the price reverses, the stop stays in place, protecting accumulated profits.
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