Re-optimization is needed when regime changes
If the market becomes faster, slower, more directional, or more range-bound, old parameters may fit worse.
Do not re-optimize after every losing trade. Look for behavior change across a series of trades.
Watch deviations from the report
If live results differ strongly from the report, check liquidity, fees, slippage, market regime, and parameter errors.
Re-optimization should be a process, not a way to fit the last successful segment.
Keep decision history
Record why a preset was updated: drawdown, new volatility, too few trades, timeframe change, or pair change.
This helps separate process improvement from emotional decisions.