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What is Long position in forex and CFD trading

A Long position is the purchase of a 貨幣對 或 CFD, reflecting a market expectation that the price of the asset will rise; it is initiated by opening a Buy trade. Entering a Long position matters for real trading decisions because it defines the primary directional risk exposure, making a trader profit from rising prices and incur losses from falling prices. A trader can verify a Long position by checking the trade’s direction on the platform’s trade list, where it is labeled as “Buy” or indicated by a positive size (e.g., +1.00 lots), confirming the base currency or underlying asset was acquired. To understand more specific trading terms, explore our comprehensive glossary.

Key facts about Long position

• Directional Bias: A Long position is inherently bullish; it is profitable only if the instrument’s price increases above the entry price.
• Initiation: A Long position is opened using the Ask price (the price at which the broker is willing to sell to the trader) and closed using the Bid price (the price at which the broker is willing to buy from the trader).
• Forex Mechanics: In a forex pair (e.g., EUR/USD), a Long position means the trader is buying the base currency (EUR) and simultaneously selling the quote currency (USD).
• Profit Calculation: Profit and Loss (PnL) for a Long position is calculated as: PnL = (Exit Price – Entry Price) × Position Size
• Swap/Rollover: Holding a Long position overnight often involves paying or receiving a swap interest based on the interest rate differential between the two currencies in the pair.
• 保證金要求： Opening a Long position requires a portion of the account equity, known as Required 保證金, which is calculated as: Margin = (Position Size × Entry Price) / 槓桿
• Risk Profile: The maximum potential profit from a Long position is theoretically unlimited, while the maximum potential loss is limited to the trade size multiplied by the asset’s price, up to the total account equity if not managed.

How Long position works in forex and CFD trading

The mechanics of taking a Long position involve securing capital and executing the transaction to establish ownership or exposure to the base asset.

此流程包含以下依序進行的步驟：

• Market Analysis: The trader determines the price of the asset, for example, EUR/USD, is likely to appreciate over the holding period.
• 下單： The trader submits a Buy order, specifying the volume (e.g., 100,000 units).
• Margin Allocation: The broker reserves the required margin from the trader’s free equity to support the Long position’s size and leverage.
• 執行： The position is opened at the broker’s current Ask price, creating an instantaneous negative PnL equal to the size multiplied by the spread.
• Monitoring: As the market price moves, the PnL fluctuates: a rising price (higher Bid/Ask) generates profit; a falling price generates loss.
• Position Closure: The Long position is closed by placing a counter-trade, which is a Sell order of the exact same size, executed at the current Bid price.

Example of Long position with a real trade

This example demonstrates the PnL calculation for a profitable Long position on EUR/USD.

損益計算：

• Price Change (in pips): 1.10500 – 1.10000 = 0.00500, or 50 pips.
• Pip Value (for 1 standard lot of EUR/USD): $10.00 per pip.
• 毛利： 50 pips × $10.00 / pip = $500.00
• Spread Cost: 0.2 pips × $10.00 / pip = $2.00
• 佣金： $0.00（零佣金機制）
• 淨利： $500.00 – $2.00 = $498.00

結果：

$498.00 profit with zero commission eliminating per-trade execution costs.

How Long position affects your cost and risk

A Long position inherently exposes the trader to the cost of the Ask price upon entry and the risk that the asset’s price will decline. It also subjects the trader to specific swap costs or gains depending on the interest rate differential.

Long position compared with related concepts

Long position vs Short position

A Long position is a market purchase (Buy), where the trader profits from a rising price, establishing a bullish bias. A Short position is a market sale (Sell), where the trader profits from a falling price, establishing a bearish bias. A Long position means acquiring the asset; a Short position means borrowing and selling the asset.

Long position vs 限價單

A Long position describes the direction and status of an open trade (an established Buy position), reflecting current market exposure. A 限價單 is a pending instruction to open a Long position (Buy Limit) or a Short position (Sell Limit) at a better price than the current market price. The Limit Order is a tool to open a position; the Long position is the resulting exposure.

Broker differences in Long position across the industry

The cost and risk of a Long position are influenced by the broker’s liquidity model, which dictates the spread and commission structure.

How to verify Long position on your trading platform

Verifying the details of a Long position involves checking the key parameters within the trade management section of a common platform like MetaTrader 5 (MT5).

• Open the Terminal/Toolbox: Navigate to the lower panel of the platform, typically called the “Terminal” in MT4 or “Toolbox” in MT5.
• Select the Trade Tab: Click on the “Trade” or “Positions” tab to view all currently open trades.
• Identify the Trade: Locate the specific instrument (e.g., EUR/USD) you are interested in.
• Check the Type Column: Verify that the entry in the “Type” column explicitly states “Buy” or a positive volume number is displayed, confirming a Long position.
• Examine Entry Price: Note the “Price” column, which is the Ask price at which the position was opened.
• Verify Swap Charge: Check the “Swap” column; the value here is the accrued cost or credit for holding the Long position overnight.
• 合理性檢查： If the “Type” is Sell, or the swap value is significantly positive, re-evaluate the interest rate differential for the Long position on that pair.