| # | STRATEGY | SYMBOL | TF | TRADES |
|---|---|---|---|---|
| 1 | OrderFlow Structure SMC EA MT5 | GBPUSD | H1 | 94 |
| 2 | OrderFlow Structure SMC EA MT5 | USDCAD | H1 | 231 |
Based on analysis of your strategy's characteristics on MULTI MIXED trading systems, we recommend using 1,428 days (3.9 years) of historical data for optimization and backtesting.
This period balances having enough data for statistical significance while avoiding outdated market conditions. The recommendation is synthesised from three independent methods: rolling-variance statistical analysis (769 days (2.1 years)), literature-informed period benchmarks (2,518 days (6.9 years)), and Politis-Romano block bootstrap spectral analysis (998 days (2.7 years)).
Rolling-variance stability test finds the lookback window where your strategy's return distribution is most stable and least regime-dependent.
| Optimal period found | 769 days (2.1 years) |
| Regime changes detected | 2 |
| Volatility adjustment | 0.74ร current/historical |
Period benchmarks for MULTI MIXED strategies, informed by asset class volatility profiles and FX market microstructure research. These are calibrated heuristics, not direct citations.
| Base period (MULTI MIXED) | 2,518 days (6.9 years) |
| Volatility adjustment | 0% (normal) |
| Adjusted period | 2,518 days (6.9 years) |
Spectral autocorrelation analysis estimates the memory structure in your returns using block resampling. Accounts for serial dependence that rolling-variance methods miss.
| Bootstrap spectral period | 998 days (2.7 years) |
| Method | Politis-Romano stationary bootstrap |
| Combined (all three) | 1,428 days (3.9 years) |
Too short (under 928 days (2.5 years)): Not enough data to capture full market cycles. Results are statistically unreliable and prone to overfitting to a single regime.
Above range (over 2,070 days (5.7 years)): The window extends beyond the calculated optimal range. Older data points contribute proportionally less signal in recent-regime models.
The sweet spot (928 days (2.5 years) โ 2,070 days (5.7 years) for MULTI MIXED): Provides enough trades for statistical confidence while focusing on recent, relevant market conditions.
Bailey, D. et al. (2014) "The Deflated Sharpe Ratio" โ Minimum track record length, multiple testing correction
Lรณpez de Prado, M. (2014) "The Deflated Sharpe Ratio" โ MinTRL formula, Sharpe standard error at finite samples
Politis, D. & Romano, J. (1994) "The Stationary Bootstrap" โ Block resampling for serially dependent data
Pardo, R. (2008) "The Evaluation and Optimization of Trading Strategies" โ Walk-forward, regime-based optimization
| Range Type | Days | Use Case |
|---|---|---|
| Minimum Acceptable | 928 days (2.5 years) | Quick tests, high-frequency strategies |
| Recommended | 1,428 days (3.9 years) | Calculated optimal โ three-method average |
| Maximum Useful | 2,070 days (5.7 years) | Conservative analysis, lower-frequency strategies |