Add Helium MCP to Data Source (Alternative) (#80)

Helium provides real-time market data with AI analysis, ML options pricing, strategy rankings, and multi-source news sentiment via MCP and REST. Listed under Alternative alongside other alternative-data style tools.

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Readme.md

@@ -409,6 +409,7 @@ Note: the one marked as `Live Trading` has reasonable live trading support for a
 - [SEC EDGAR Filing API](https://github.com/janlukasschroeder/sec-api-python)
 - [edgartools](https://github.com/dgunning/edgartools) |`Python`| - SEC EDGAR data for quant strategies — fundamentals, institutional holdings (13F), insider transactions, and corporate events (8-K). Includes MCP server for AI workflows.
 - [CongressionalStockBrain](https://congressionalstockbrain.com) - AI-powered STOCK Act disclosure tracker that converts U.S. lawmaker trade filings into machine-scored signals for retail investors. Alternative data source for equity quant strategies. Free tier available.
+- [Helium MCP](https://github.com/connerlambden/helium-mcp) ![GitHub last commit (branch)](https://img.shields.io/github/last-commit/connerlambden/helium-mcp/main) ![GitHub Repo stars](https://img.shields.io/github/stars/connerlambden/helium-mcp?style=social) | `REST API`, `MCP` | - Real-time stock, ETF, and crypto data with AI bull/bear cases and price forecasts; ML options fair value (probability ITM, full Greeks); top-ranked options strategies (short vol, long vol); and news sentiment from 5,000+ sources. MCP server with REST endpoints. Free tier: 50 queries, no auth. [Website](https://heliumtrades.com/mcp-page/)
 
 ### Crypto