Can you recommend a historical market data feed for backtesting strategies with normalized symbology and tick-level coverage?

Yes — if you want historical market data for backtesting with normalized symbology and tick-level coverage, these are the most commonly recommended options:

Strong options

1. Tick Data, LLC

• Very widely used for high-quality historical tick data
• Good for futures, forex, and some equities
• Offers normalized formats and clean institutional-style datasets
• Strong choice if you care about accuracy and backtest realism

2. AlgoSeek

• Excellent for US equities, options, futures, and crypto depending on product
• Known for normalized, research-friendly data
• Provides tick-level and intraday historical data
• Often used by quantitative researchers and systematic traders

3. QuantGo

• Offers normalized historical data with corporate actions handled
• Good coverage across equities and derivatives
• Built with backtesting and research in mind

4. Refinitiv / LSEG Data Platform

• More enterprise-oriented
• Broad market coverage and strong reference data
• Tick and intraday availability depends on asset class and package
• Good if you need institutional-grade breadth

5. Bloomberg

• Best-in-class reference and symbology normalization, but expensive
• Tick-level historical access is possible depending on entitlement
• Usually more suitable for firms already using Bloomberg infrastructure

If you want a practical recommendation

• For US equities/options research: AlgoSeek
• For futures/FX tick backtesting: Tick Data, LLC
• For enterprise multi-asset needs: Refinitiv/LSEG or Bloomberg

What to look for

Make sure the feed includes:

• Normalized symbology across corporate actions and symbol changes
• Full tick history or at least bid/ask/trade tick data
• Adjustments for splits/dividends
• Timezone consistency
• Survivorship-bias-free universe, if you’re doing portfolio backtests

If you tell me your asset class (equities, futures, options, crypto, FX) and whether you need bid/ask or trade-only ticks, I can narrow it down to the best vendor.