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How to calculate percentage in forex?

When it comes to trading forex, understanding how to calculate percentage is a crucial skill to have. Percentage calculations are used to determine profits, losses, and potential risks in forex trading. Here is an in-depth guide on how to calculate percentage in forex.

Calculating Percentage Gain or Loss on a Trade

Percentage gain or loss is a common calculation used in forex trading to determine the profitability of a trade. It is calculated by taking the difference between the entry price and the exit price of a trade, dividing that by the entry price, and then multiplying by 100 to get a percentage.

Here is an example:

Let’s say you bought the EUR/USD at 1.2000 and sold it at 1.2500. To calculate the percentage gain, you would use the following formula:

(Exit Price – Entry Price) / Entry Price x 100

(1.2500 – 1.2000) / 1.2000 x 100 = 4.17%

In this example, the trade resulted in a 4.17% gain.

Calculating Risk-to-Reward Ratio

The risk-to-reward ratio is another important calculation used in forex trading. It helps traders determine whether a trade is worth taking based on the potential reward compared to the potential risk.

The risk-to-reward ratio is calculated by dividing the potential reward by the potential risk. This is typically expressed as a ratio, such as 1:2, which means the potential reward is twice the potential risk.

Here is an example:

Let’s say you are considering a trade on the EUR/USD with an entry price of 1.2000, a stop loss at 1.1900, and a take profit at 1.2200. To calculate the risk-to-reward ratio, you would use the following formula:

(Take Profit – Entry Price) / (Entry Price – Stop Loss)

(1.2200 – 1.2000) / (1.2000 – 1.1900) = 2:1

In this example, the risk-to-reward ratio is 2:1, meaning the potential reward is twice the potential risk.

Calculating Margin Requirement

Margin is the amount of money required to open and maintain a position in forex trading. It is calculated as a percentage of the total position size.

Here is an example:

Let’s say you want to open a position on the EUR/USD with a notional value of $100,000 and a margin requirement of 2%. To calculate the margin requirement, you would use the following formula:

Notional Value x Margin Requirement = Margin Requirement

$100,000 x 0.02 = $2,000

In this example, the margin requirement is $2,000.

Calculating Position Size

Position size is the amount of currency you are trading in a particular trade. It is calculated based on the size of your account, the percentage of your account you are willing to risk, and the distance between your entry price and stop loss.

Here is an example:

Let’s say you have a $10,000 account and are willing to risk 2% per trade. You want to buy the EUR/USD at 1.2000 with a stop loss at 1.1900. To calculate the position size, you would use the following formula:

(Account Size x Risk Percentage) / (Entry Price – Stop Loss)

($10,000 x 0.02) / (1.2000 – 1.1900) = $200

In this example, the position size is $200.


Calculating percentage is essential in forex trading as it helps traders determine the profitability of a trade, the risk-to-reward ratio, margin requirements, and position size. Understanding how to calculate percentage can help traders make better-informed decisions and manage their risk effectively. By using the formulas discussed in this article, traders can calculate percentage with ease and confidence.

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