BeginnerUtilities & ToolsJavaScript

Run this module

cd "Historical Data"
node "FetchBars.js"

Alpaca Historical Data Fetcher¶

A Node.js script that fetches historical bars (OHLCV data) for stocks or crypto from the Alpaca Market Data API. It prompts interactively for the symbol type, symbol, timeframe, and date range, then prints the results as JSON.

External API: This utility calls the Alpaca Market Data API. A network connection and valid API credentials are required.

Files¶

File	Description
`FetchBars.js`	Interactive Node.js historical-bars fetcher
`package.json`	Node.js dependencies

Requirements¶

Node.js v14 or higher
An Alpaca account with API credentials

Setup¶

Install dependencies:
```
npm install node-fetch dotenv
```

Create a .env file in the project root to hold your credentials:

ALPACA_API_KEY=your_alpaca_api_key_here
ALPACA_API_SECRET=your_alpaca_api_secret_here

Usage¶

node FetchBars.js

You will be prompted for:

Symbol type — stock or crypto
Symbol — e.g. AAPL for stocks, BTC/USD for crypto
Timeframe — e.g. 1Day, 1Hour, 5Min
Start date — YYYY-MM-DD
End date — YYYY-MM-DD

The script fetches the matching bars and prints them in JSON format.

Example session¶

Enter symbol type (stock/crypto): stock
Enter symbol (e.g. AAPL for stock, BTC/USD for crypto): AAPL
Enter timeframe (e.g. 1Day, 1Hour, 5Min): 1Day
Enter start date (YYYY-MM-DD): 2023-01-01
Enter end date (YYYY-MM-DD): 2023-01-31

Notes¶

Ensure your API key has permission for the data class you request.
See the Alpaca Stock Bars API docs and Alpaca Crypto Bars API docs for the full list of supported timeframes and parameters.

License¶

MIT

Continue in Utilities & Tools¶

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