The simulator lists its own assumptions on the page. Two of them matter more than the rest.
- Days, or trades, are treated as independent. Streaks, tilt and regime are not modelled — and clustered losses hit a drawdown floor far more often than independent ones do.
- The rules are the ones you entered. Nothing here knows your firm, so check them against its current terms before you buy.
Read the output as a comparison tool — this size against that size, this risk against that risk — rather than as a forecast. The ranking between two setups is far more trustworthy than the absolute percentage.