FREE TOOL
Position size calculator
How many lots to trade for a fixed risk — an estimate you can edit to match your broker.
Set the money you are willing to lose on one trade (balance × risk %), then divide it by the loss one lot would take at your stop-loss. Pick a pair to prefill its pip value, or type your own — nothing is hidden.
Prefilled from the pair. Edit it to match your broker for exact results.
Estimated lot size
0.50 lots
Risk amount: $100.00
Loss per lot at this stop: $200.00
Estimate only. Contract size and pip value vary by broker and pair (JPY pairs, crosses, indices) — edit the pip value to match yours. When LOTUX runs the trade, it sizes from your broker’s exact figures.
How it works
- Risk amount = balance × risk % ÷ 100.
- Loss per lot = stop-loss (pips) × pip value per lot.
- Lot size = risk amount ÷ loss per lot, rounded down to your lot step (never above your risk).
AUTOMATE IT
Let LOTUX apply this on every trade
These are the same calculations LOTUX runs automatically — set your risk rules once and every signal from TradingView, a webhook, an AI bot or a copied master is sized and executed for you.
- Self-host — run the bridge on your own machine.
- Cloud — run it on LOTUX cloud instead.
Most bridges give you one or the other. LOTUX gives you both.
Questions
- How do I calculate position size for MT5?
- Decide the money you will risk (balance × risk %). Divide it by your stop-loss distance in pips times the pip value per lot. The result is your lot size. This calculator does that for you and lets you edit every input.
- What lot size should I use for 1% risk?
- It depends on your balance, your stop-loss distance and the pair. Enter them above with risk set to 1% — the calculator returns the lot size that loses exactly 1% of the balance if the stop is hit.
- Is this accurate for my broker?
- It is an estimate using standard-account pip values. Contract size and pip value differ across brokers and pairs, so edit the pip value field to match yours. LOTUX itself sizes trades from your broker’s exact tick data at execution time.
- Does LOTUX size my trades automatically?
- Yes. Set a risk % once and LOTUX calculates the lot for every signal from TradingView, a webhook, an AI bot or a copied master — on your own machine (self-host) or on LOTUX cloud.