Assume that an investor opens a forex account by depositing $50,000.
Let’s assume that the current spot price of silver is $30 per ounce, and the investor expects a downward movement in silver prices. In this case, the investor’s position direction will be SHORT.
The investor will take the following position:
1 LOT = 5,000 ounces × $30 = $150,000 position size.
For this transaction, 10% of the position size will be used as margin from the account balance.
Initial Margin = $150,000 / 10 = $15,000
(An amount of $15,000 will be reserved from the account as margin to open the position.)
| Account Balance | $50.000 |
| Margin | $15.000 |
| Free Margin | $35.000 |

In summary, the investor has opened a short position with a position size of 1 LOT = 5,000 ounces = $150,000.
If the silver price falls to $29.00, what will be the profit or loss on the investor’s account?
1 LOT = 5,000 ounces = $145,000 position size, therefore:
Position value difference: $150,000 - $145,000 = $5,000 profit will be reflected in the investor’s account.
This means that for silver, a $1 movement per 1 lot corresponds to $5,000.
If the investor had executed the same transaction with 0.10 LOT, the following situation would occur:
0.10 LOT = 500 ounces × $30 = $15,000 position size.
For this transaction, 10% of the position size will be used as margin from the account balance.
Initial Margin = $15,000 / 10 = $1,500
(An amount of $1,500 will be reserved from the account as margin to open the position.)
| Account Manager | $50.000 |
| Margin | $1.500 |
| Free Margin | $48.500 |

If the silver price falls to $29.00, what will be the profit or loss on the investor’s account?
0.10 LOT = 500 ounces = $14,500 position size, therefore:
Position value difference: $15,000 - $14,500 = $500 profit will be reflected in the investor’s account.
This means that for silver, a $1 movement per 0.1 lot corresponds to $500.
