A deliberately small, constructed example showing why fees matter. These are illustrative data, not actual market performance, a customer result or a forecast.
STRATEGY LAB / AUDITIllustrative data
Strategy Audit Report
MA Crossover · BTC/USDT · Long only
REVIEW REQUIRED01
Before trading costs+0.10%
After modelled fees-0.10%
A positive result becomes a loss after fees.
0.10% fee per side · 1 closed trade · 8 synthetic candles
Trading costs
Return changes sign
Sample size
Too short to establish robustness
Risk limits
Not evaluated in this example
Real execution
Not performed
A model, not a promise. Inspect the assumptions.
Model and assumptions
SMA 2/3, one long position, initial balance 1,000 USDT. Signals use a closed candle; conditional fills use the next candle’s open. Fees apply on entry and exit; fixed slippage is zero in this fixture. No real orders are sent.
Initial balance, USDT
1,000.00
Final equity, USDT
999.00
Total fees, USDT
1.999001
Engine version
sma-crossover-1.1.0
Illustrative report generated from the same deterministic calculation used by Strategy Lab. Rounded values are for display; the underlying fixture is tested against the engine.
Evidence, not a score
Conditional fills · UTC
Side
Fill time
Price, USDT
Fee, USDT
Buy
2026-10-01 06:00:00 UTC
100.00
0.999001
Sell
2026-10-01 07:00:00 UTC
100.10
1.00
What this example does not establish
Eight synthetic hourly candles and one closed trade cannot establish robustness. This example uses zero fixed slippage and does not evaluate risk-limit enforcement. Spread, exchange filters, latency, order-book liquidity and taxes are not modelled. No out-of-sample test has been performed.