Running the Margin Calculator Backwards from a Closed Trade · India
FxPro provides trading calculators so you can work out margin, pip value and potential profit or loss before placing a trade.
Open FxPro Account →The calculators are built to be run before a trade, and they are just as useful run backwards over one that has already closed. At FxPro the margin you need is your position size divided by your leverage: at 1:200 that is 0.5% of the position — about $540 for a one-lot EUR/USD trade, roughly $108,000 of notional — and about $1,080 at 1:100. None of that margin is a cost, though: it is collateral held while the position is open and released when it closes, so it never belongs in the cost total you are rebuilding. The figures that do belong there are the commission, the swap and the spread inside the fill price. FxPro's free margin, pip, profit/loss and swap calculators, available inside the platforms, are what let you restate a finished position in the same terms it was opened with. Leverage and margin cut both ways — a smaller margin controls a larger position and a bigger potential loss.
Measured contract values for your calculations
Read live from FxPro’s MT5 Raw+ feed — the contract size, tick value, lot limits and average daily range behind any margin, pip-value, stop-size or profit calculation:
| Instrument | Contract size | Tick value (USD) | Min lot | Max lot | Avg daily range |
|---|---|---|---|---|---|
| EUR/USD | 100,000 | $1.00 | 0.01 | 500 | 45.5 pips |
| GBP/USD | 100,000 | $1.00 | 0.01 | 500 | 53.9 pips |
| AUD/USD | 100,000 | $1.00 | 0.01 | 500 | 42.8 pips |
| USD/CAD | 100,000 | $0.72 | 0.01 | 500 | 65.6 pips |
| USD/JPY | 100,000 | $0.65 | 0.01 | 500 | 141.2 pips |
| XAU/USD (Gold) | 100 | $1.00 | 0.01 | 500 | 10838.1 pips |
Tick value is the cash change per minimum price move, per standard lot; the 14-day average daily range helps you size stops and targets. Account stop-out levels (measured): margin call at 10%, stop-out at 0% — confirm the live values in your terminal.
Work out your margin
Margin = position size ÷ leverage. Approximate, for USD-quoted forex pairs (1 standard lot = 100,000 units); margin is shown in USD and varies with the live price. Your exact margin appears in your FxPro platform.
FxPro trading calculators
- Margin calculator — how much margin a position requires
- Pip calculator — the value of a pip in your account currency
- Profit/loss and swap calculators for trade planning
- Available inside the FxPro platforms
Plan before you trade
Use the calculators alongside our swap rates pages to estimate your total trading costs.
Open FxPro Account →Running the calculators backwards
Before a trade the calculators answer whether you can do this. Afterwards they answer a better question: what this actually committed and what it actually cost. The inputs are the same, but you enter the size, price and leverage the position really ran at instead of the ones you were weighing up.
That backwards run is what makes an old deal comparable to a new one. Position size divided by leverage gives the margin that was tied up: 0.5% of the position at 1:200 and twice that at 1:100, applied to the notional the deal really ran at — contract size multiplied by the price it was opened at, not by today's. Change nothing but the leverage and the same closed trade reads as a different commitment.
Do it for the handful of largest positions in the period rather than for all of them. What you are after is the shape of the commitment, not a second copy of the report.
The number that was committed, not spent
Margin is the figure most often mistaken for a cost, and the mistake runs in the expensive direction: counted as money spent, it makes a period look worse than it was. Margin is collateral. It is held while the position is open and released when it closes, and it belongs in a risk column, never in a cost column.
The costs are three: commission, itemised per deal; swap, itemised per night; and the spread, taken inside the fill price and itemised nowhere. Margin appears in none of them, and no amount of leverage changes what a trade cost — only what it tied up.
What margin does explain is why a period felt tight even though its cost total was modest. Several positions held at once tie up their margin at the same time, and the free margin left over is what decided whether the next trade could be taken at all — a constraint that shaped the history you are reading and left no trace in any cost column. Confirm the margin levels your own account runs at in your terminal before sizing anything from them.
Rebuilding a period from the volume column
One column does most of the work in a post-factum review, and it is not the profit column — it is volume. Costs scale with lots traded, margin scales with position size, and both are read out of the same place.
Add the lots you closed in each instrument over the period, then price them: commission at $3.50 per lot per side, spread at the measured cost per lot for that instrument, swap from its own column. The measured contract table above supplies what the arithmetic needs — contract size, tick value, the 0.01-lot step and the limits between 0.01 and 500 lots.
The output worth keeping is cost per lot traded. It survives a change of trade size, it compares straight against the measured all-in cost per lot for the instruments involved, and it is the one number that says whether the account model you are on suits the volume you actually put through it.