Import market data
Bring historical data into the workflow and avoid common data quality traps.
01 Use clean inputs
Backtests are only as credible as their input data. Confirm timestamps, missing bars, split adjustments, and symbol conventions before comparing results.
- 1Use consistent timezone handling across files.
- 2Avoid mixing adjusted and unadjusted data in one comparison.
- 3Check for large gaps before running optimization.
02 When results look wrong
Most surprising backtest results come from a mismatch between expected data shape and actual data shape. Inspect a sample of raw rows before changing strategy logic.
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