Position size calculator
The size of your next trade, and what the account becomes if the losses keep coming.
After 6 losses in a row €9,414.80
A drawdown of −5.85%, then a gain of +6.22% to get back to the start.
A run of 6 to 10 losses happens to every method, winning ones included.
Loss-by-loss detail
| Loss # | Lost | Account |
|---|---|---|
| Start | €10,000.00 | |
| 1 | €100.00 | €9,900.00 |
| 2 | €99.00 | €9,801.00 |
| 3 | €98.01 | €9,702.99 |
| 4 | €97.03 | €9,605.96 |
| 5 | €96.06 | €9,509.90 |
| 6 | €95.10 | €9,414.80 |
A calculation tool, not investment advice.
How the size is worked out
Start from the risk, never from the amount. Risk in euros = account size × risk per trade. Number of shares = risk in euros ÷ (entry − stop). With €10,000, 1% and a stop €4 below entry: €100 at risk, 25 shares.
A cap bounds the result: no position goes above 15% of the account. Without it, a very tight stop would put the whole account on a single line. It is the same rule as in the Sweengs app.
Why simulate a losing streak
Because it happens. A method that wins one trade in two will sooner or later line up six losses in a row. The question is not how to avoid it, it is what is left afterwards.
At 1% per trade, six losses take €10,000 to €9,414.80: a 5.85% drawdown, not 6%, because each trade is sized on what is left. At 2%, the drawdown is 11.42%. At 5%, 26.49%, and you then need a 36% gain to get back to where you started.
What next
Size is only one column of the plan. The trading plan template we use has eight, filled in before the order: get it here.