Understanding how to calculate trading volume is a core forex trading skill, since the resulting figure feeds directly into other important calculations like margin and pip value. This guide walks through the formula, shows worked examples, and explains the role of lot and contract size in the calculation.
Key Takeaways
- Trading volume is calculated with a single formula: Trading Volume = Number of Lots x Contract Size.
- The process involves 2 main components: knowing your lot size and knowing the contract size of the instrument you're trading.
- Contract size varies by trading instrument, so the same number of lots can produce very different volume figures across instruments.
- Trading volume matters because it's used in other key calculations, including margin and pip value.
- A common blocker is not knowing the contract size for a specific instrument, since it isn't a fixed universal number.
Before You Start
Before calculating trading volume, you need to know two things: the number of lots in your trade, and the contract size for the specific instrument you're trading, since contract size varies by instrument. [GAP: original content does not specify where a trader can look up the exact contract size for a given instrument.]
Step-by-Step Guide to Calculating Trading Volume
Step 1: Identify the number of lots in your trade
Determine how many lots your order involves. Lot refers to the standard unit size of a transaction. There are several lot types to be aware of:
- Standard lot: 1 lot = 100,000 units
- Mini lot: 0.1 lot = 10,000 units
- Micro lot: 0.01 lot = 1,000 units
Step 2: Identify the contract size for your instrument
Determine the contract size for the instrument you're trading. Contract size is a fixed value that denotes the amount of base currency in 1 lot, and it varies based on the trading instrument. For example, in the source examples, EURUSD uses a contract size of 100,000 EUR per lot, while UKOIL uses a contract size of 1,000 Barrels per lot.
Step 3: Apply the trading volume formula
Multiply the number of lots by the contract size:
Trading Volume = Number of Lots x Contract Size
Step 4: Check your result against a worked example
Use the following examples to confirm your calculation is correct:
Example 1: A client placed an order to Buy 3 lots EURUSD.
Trading Volume = 3 x 100,000 EUR = 300,000 EUR
Example 2: A client placed an order to Sell 3 lots UKOIL.
Trading Volume = 3 x 1,000 Barrels = 3,000 Barrels
Frequently Asked Questions
What is trading volume and why is it important?
Trading volume refers to the amount of base currency a trader is trading. Knowing how to calculate it is important in forex trading because the resulting figure is used in other key calculations, such as margin and pip value.
How do I calculate trading volume in forex?
Multiply the number of lots in your trade by the contract size of the instrument: Trading Volume = Number of Lots x Contract Size. For example, buying 3 lots of EURUSD with a contract size of 100,000 EUR per lot gives a trading volume of 300,000 EUR.
Does contract size stay the same across all instruments?
No. Contract size is a fixed value denoting the amount of base currency in 1 lot, but it varies based on the trading instrument. For example, EURUSD uses 100,000 EUR per lot, while UKOIL uses 1,000 Barrels per lot in the source examples. [GAP: original content does not provide contract size figures for instruments beyond EURUSD and UKOIL.]
Conclusion
Calculating trading volume comes down to one formula — number of lots multiplied by contract size — applied consistently once you know your lot size and the contract size of the instrument you're trading. Getting comfortable with this calculation is a useful foundation, since the result feeds into other important figures like margin and pip value.
