Based on Lucky Gold’s current contract specification for London Silver of 5,000 ounces per lot, for every $0.1 movement in silver price, 0.01 lot corresponds to approximately $5 in floating P&L, 0.1 lot around $50, and 1 lot around $500. For a price increase, buy positions and sell positions move in opposite directions in terms of profit and loss.
This question may seem straightforward, yet it is well worth calculating before placing a trade. The capital fluctuation a trader is exposed to depends on how much the price moves and the lot size traded.
How to Calculate Silver Profit and Loss
You may refer to this formula: Floating P&L = Price Change × 5000 Ounces × Trading Lot Size
Assume the silver price moves from $50.00 to $50.10. The price change is $0.10.
Then: 0.01 lot: 0.10 × 5000 × 0.01 = $5
0.1 lot: 0.10 × 5000 × 0.1 = $50
1 lot: 0.10 × 5000 × 1 = $500
These figures represent the theoretical floating amount from price movement only, excluding trading costs such as spread and overnight charges.
How to Interpret Buy and Sell Positions
If you hold a buy position, a rise in silver price normally brings floating profit, while a price drop results in floating loss. For a sell position, the logic is reversed.
For example, opening a 0.1-lot buy position at $50. If the price later climbs to $50.10, the price movement corresponds to roughly $50 based on the contract specification. If the price falls from $50 to $49.90, it will lead to around $50 floating loss.
For the same $0.1 market move, the lot size determines how much your account balance shifts.
Why a Minor Silver Price Movement Can Trigger Noticeable Account Changes
Many new traders may think a $0.1 move in silver is insignificant at first glance. Once factored into the standard contract, the impact becomes clear. One lot of London Silver equals 5,000 ounces. A $0.1 change per ounce totals $500 across 5,000 ounces.
When trading silver, judging volatility only by a "few cents of movement" visible on the K-line chart can easily lead to underestimation of the actual monetary impact. A more practical approach is to directly convert market movement into the dollar amount relevant to your own position.
Does 0.01 Lot Mean Very Low Risk?
A 0.01-lot position carries far smaller absolute price exposure than 0.1 lot or 1 lot. However, overall account risk also depends on account size, holding duration and the magnitude of market swings. A $1 movement in silver already generates around $50 floating P&L for 0.01 lot. Sustained larger swings will keep accumulating capital fluctuations.
Reducing the lot size limits absolute position exposure, but it does not stop market volatility.
Do Not Mix Margin and Profit & Loss in Calculation
Lucky Gold’s current margin requirement for London Silver is $650 per lot. The margin for 0.1 lot is approximately $65.
As calculated above, a $0.1 silver price change brings around $50 floating P&L for 0.1 lot. Comparing these two figures helps illustrate why sufficient usable funds must be reserved for margin trading.
The $65 refers to the locked margin. The $50 stands for the theoretical P&L triggered by a $0.1 price move. They serve two different purposes.
A 10-second Check Before Placing an Order
Check the current silver price. Decide how many lots you plan to trade. Simulate adverse price moves of $0.1, $0.5 and even $1. Work out the three corresponding results.
If any outcome exceeds your risk tolerance, reconsider your position size.
Risk Warning: The calculations above only illustrate the relationship between London Silver price movements and trading lot sizes. Actual account results are subject to execution price, spread, overnight fees and other trading terms.