How the engine works
Style presets
The Style tab offers "one-click presets that set opinionated GA, validation, and gate defaults for a holding horizon. Picking one repopulates the other tabs."
The presets
Each style is a card; the active one is highlighted. Hover the card's info button to see exactly which knobs the preset changes (walk-forward folds, population, generations, gate floors, sizing, equity mode, and so on) before committing.
| Style | Intent |
|---|---|
| Balanced | Engine defaults — no optimizer, validation, or gate overrides. The neutral starting point. |
| Scalper | Short holding times and high trade counts: short walk-forward folds, higher trade-count floors, frequency-friendly settings. |
| Intraday | Day-trading horizon between scalping and swing. |
| Swing | Multi-day holds: long walk-forward folds, relaxed trade-count floors. |
How presets interact with your settings
A preset is a starting point, not a mode — it writes values into the Optimizer, Quality, Gates, and Run tabs, which you can then edit freely. Picking another preset overwrites those fields again, so choose the style first and fine-tune second.
The Style score
The leaderboard's Style column (0–100) measures how well a discovered strategy actually matches the declared style — it reads low on drift. A "Scalper" run that evolves strategies holding positions for hours will score poorly on Style even if the P&L looks good; that mismatch is worth knowing before you trade something expecting scalper behavior. See Reading the leaderboard.