Calculator Form
Category: Physics
Formula Used
The calculator first finds the risk capital. If percent mode is selected, risk capital equals account balance multiplied by risk percent divided by 100.
Risk Capital = Balance × Risk Percent ÷ 100
Price risk is the absolute difference between entry and stop loss. That value is converted into ticks using the symbol tick size.
Stop Ticks = |Entry Price − Stop Loss Price| ÷ Tick Size
Spread and slippage ticks are added to reflect more realistic execution. Commission is added per full lot.
Risk Per Lot = Total Risk Ticks × Tick Value + Commission Per Lot
The raw lot size is calculated from allowed risk and risk per lot.
Raw Lots = Risk Capital ÷ Risk Per Lot
The answer is rounded down to the lot step. Then it is checked against minimum and maximum lot settings.
Margin = Final Lots × Contract Size × Margin Price ÷ Leverage
How to Use This Calculator
- Enter your account balance and account currency.
- Select percent risk or fixed money risk.
- Add entry price, stop loss price, and optional take profit price.
- Enter tick size, pip size, and tick value from your symbol details.
- Add spread, slippage, commission, lot step, and lot limits.
- Enter contract size, leverage, and margin price.
- Press the calculate button.
- Review final lot size, risk, reward, margin, and warnings.
- Use the CSV or PDF button to save the result.
Example Data Table
| Symbol |
Balance |
Risk |
Entry |
Stop |
Tick Size |
Tick Value |
Lot Step |
| EURUSD |
10000 |
1% |
1.08500 |
1.08000 |
0.00001 |
1.00 |
0.01 |
| XAUUSD |
5000 |
2% |
2350.00 |
2338.00 |
0.01 |
1.00 |
0.01 |
| US30 |
15000 |
0.75% |
39000 |
38850 |
1 |
1.00 |
0.10 |
MetaTrader Position Size Planning Guide
Why Lot Size Matters
This calculator helps a trader size a MetaTrader order. It uses balance, risk, stop distance, tick value, and lot rules. You decide how much money can be lost if the stop is hit. The tool then converts that loss limit into a lot size.
Position sizing matters because price distance changes from trade to trade. A ten point stop is not equal to a one hundred point stop. Gold, indices, forex pairs, and synthetic symbols also use different tick values. A fixed lot can create hidden risk. This tool reduces that problem by linking lot size to the stop.
How the Calculation Works
The calculation starts with risk capital. You can use a percent of balance or a fixed money amount. The stop distance is measured from entry price to stop loss. Spread and slippage are added because real fills can be worse than the chart plan. Commission is also included when your broker charges a round turn fee.
The calculator then finds risk per lot. It divides the total allowed risk by that per lot risk. The answer is rounded down to your lot step. It is also checked against minimum and maximum lot limits. This mirrors common symbol settings in trading terminals.
Risk, Margin, and Reward
Margin is estimated with contract size, price, leverage, and final lots. This is not the same as risk. Margin is the deposit needed to open the trade. Risk is the planned loss at the stop. Both values should be reviewed before placing an order.
Take profit is optional. When you enter it, the tool estimates reward and reward to risk ratio. This makes trade quality easier to compare. A large target with a small stop may look strong. Yet spread, commission, and slippage can reduce the real edge.
Safer Use Tips
Use conservative inputs. Broker tick value can vary by symbol and account currency. Confirm symbol specifications inside your terminal. Check lot step, tick size, and tick value before trusting any result. Markets can gap. Stops may slip. A calculator supports planning, but it cannot remove trading risk.
For best use, save your common symbol settings. Then adjust entry, stop, and risk for each setup. Review the result, margin, and reward ratio together. Place orders only when the size matches your trading plan.
FAQs
What is a MetaTrader position size calculator?
It estimates trade lot size using account balance, risk amount, stop distance, tick value, and broker lot rules.
Does this calculator work for forex pairs?
Yes. Enter the correct tick size, pip size, tick value, contract size, and lot step from your symbol specification.
Can I use it for gold or indices?
Yes. It can handle gold, indices, and other symbols when the tick value and contract size are entered correctly.
Why is spread included in risk?
Spread can make real entry or exit worse than planned. Adding it gives a more conservative position size.
Why is my lot size below the minimum?
Your allowed risk may be too small for the stop distance and symbol settings. The tool warns when minimum lot is used.
Is margin the same as risk?
No. Margin is the deposit needed to open the order. Risk is the estimated loss if the stop is reached.
What is tick value per lot?
It is the money value of one tick movement for one full lot. Check it inside your trading terminal.
Can this calculator guarantee exact broker results?
No. Broker settings, currency conversion, execution, swaps, and slippage can change final results. Always confirm before trading.