Adjustment types
Forward adjustment aligns history to today's price; backward keeps historical levels. Vendors name them differently.
Ex-dividend gaps
Corporate action days create price gaps — strategies should tag them, not treat as volatility.
Align with API
Confirm TIQEX kline field docs and pick one adjustment convention in your backtest engine.
Backtest traps
Mixing adjusted and unadjusted series breaks indicators; lock one convention and data_version during sweeps.
Related
OHLCV glossary and backtest guide; calendar for holidays/halts.