Data Sources

StockPulse aggregates market data from multiple providers to deliver real-time stock quotes, historical charts, and market indices. Here is a complete breakdown of our data infrastructure.

Providers

Finnhub

Visit

Primary data provider for all stock quotes. Delivers real-time quotes for US-listed equities including American Depositary Receipts (ADRs) of international companies like Shell, AstraZeneca, HSBC, SAP, and Alibaba.

Coverage

US stocks (NYSE, NASDAQ) + US-listed ADRs

Refresh Rate

Every 60 seconds

Plan

Free - 60 API calls per minute

Usage

28 tracked symbols

Twelve Data

Visit

Secondary provider available for additional data coverage. The free tier covers US equities. Paid plans unlock London Stock Exchange, XETRA, Hong Kong, and other international exchanges.

Coverage

US equities (free tier); Global with paid plans

Refresh Rate

Available for time series data

Plan

Free - 800 API credits per day

Usage

Backup provider

Market Index Tracking

Direct index data (S&P 500, Dow Jones) requires expensive exchange licenses. We use highly liquid ETF proxies that closely track major indices.

ETF SymbolTracksProvider

SPYS&P 500SPDR

DIADow Jones Industrial AverageSPDR

QQQNASDAQ-100Invesco

IWMRussell 2000iShares

EFAMSCI EAFE (International)iShares

VWOFTSE Emerging MarketsVanguard

Update Schedule

Stock quotes

Every 60 seconds(Finnhub)

Market indices

Every 5 minutes(Finnhub (ETF proxies))

Chart candle data

Cached for 5 minutes(Finnhub / Twelve Data)

Search results

Cached for 60 seconds(Finnhub + local)

Important Disclaimer

Market data displayed on StockPulse is provided by third-party services and may be subject to delays, inaccuracies, or temporary outages. Data is for informational and educational purposes only. It does not constitute financial advice. Always verify data with your broker before making trading decisions.