Position size calculator
How many shares to trade so that being stopped out loses only the amount you chose, with fees and currency conversion included.
Example figures
Your figures
Result
Shares to buy
85 shares
- Risk budget
- A$250.00
- Loss if the stop is hit, after fees
- A$248.50 (0.99% of the account)
- Budget left unused by rounding
- A$1.50
- Stop distance
- A$2.70 a share (6.35%)
- Fees for the round trip at the stop
- A$19.00
- Break-even exit price after fees
- A$42.73
| Target | Price | Profit after fees | Net R |
|---|---|---|---|
| 1R | A$45.20 | A$210.50 | 0.85R |
| 2R | A$47.90 | A$440.00 | 1.77R |
| 3R | A$50.60 | A$669.50 | 2.69R |
The loss assumes the stop fills at its price. Gaps can make it larger.
Saved scenarios
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How this is calculated
The risk budget is your account size times the risk percentage (or the fixed amount). The loss if the stop is hit, for q shares, is:
q × |entry − stop| + 2 × flat fee + q × (fee % + FX fee %) × (entry + stop)
That covers the price move, a flat and a percentage fee on the way in and out, and the conversion fee on the value converted at entry and at exit. It is converted to your account currency at the exchange rate shown. The calculator solves for q and rounds down, so the loss never exceeds your budget; any amount left unused is shown.
The break-even price is where selling (or buying back) the whole position covers both fees. The 1R, 2R and 3R prices are one, two and three times the stop distance from the entry; their profits are after fees.
A stop is not guaranteed. Prices can gap past it at the open or on news, and the loss can then be larger than the figure here. Reference exchange rates are daily mid-market rates; your broker's rate includes its margin, which is what the conversion fee field is for.