Position calculator
How much to buy so that hitting your stop-loss costs you no more than you planned. Plus and the risk/reward ratio. Free, no sign-up.
Position size and risk/reward
Position size
20 units
You risk
100.00 USD
Position value
2,000.00 USD
Direction
Long (buy)
Stop-loss distance
5 %
Leverage needed
none
Risk/reward
1 : 3
Potential profit
300.00 USD
Break-even win rate
25 %
With this ratio, at least this share of trades has to win for you not to lose money.
The result is indicative and leaves out fees, slippage and funding. This is not investment advice.
How it is calculated
- Position size
- Amount at risk = account × risk %. Position size = amount at risk ÷ distance from entry to stop-loss. If the market hits your stop-loss, you lose exactly the amount at risk (before fees and slippage).
- Risk/reward
- How much you can make (distance to target) compared with how much you risk (distance to stop-loss). An R:R of 1:3 means the potential profit is three times the risk.
- Break-even win rate
- The win rate at which a strategy with a given R:R breaks even: 1 ÷ (1 + R). At 1:2 you need to win 33.3% of trades, at 1:1 half of them.
- How much to risk per trade?
- 0.5–2% of the account is a common rule of thumb. Smaller risk means a losing streak will not wipe out the account. This is not investment advice – the decision is yours.
Doing this for every trade?
WiggleWick loads your trades from exchanges by itself, works out R, win rate and drawdown for each, and shows which strategies really make you money.
Try it free14 days free, no card needed.