Prompt
Can you recommend a historical market data feed for backtesting strategies with normalized symbology and tick-level coverage?
Latest observation
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.
Observation history
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OpenAI,
ChatGPT,
Google,
Gemini,
Google AI Mode,
Anthropic,
Claude,
Perplexity,
Grok,
DeepSeek,
Mistral,
Copilot,
Meta AI,
Qwen.
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