Add VantageGrid to commercial services (#518)

README.md

@@ -711,6 +711,7 @@ A curated list of insanely awesome libraries, packages and resources for Quants
 - [System R](https://systemr.ai/) - AI-native risk intelligence API for trading agents. Position sizing, risk validation, and system health in one call.
 - [Telonex](https://telonex.io) - Tick-level prediction market data (trades, quotes, orderbooks, on-chain fills) via REST API and Python SDK.
 - [ValueRay](https://www.valueray.com/api) - Technical, quantitative and sentiment data for stocks and ETFs with risk metrics, peer percentiles and market regime signals. Optimized for AI/LLM agents.
+- [VantageGrid](https://vantagegrid.pro/) - Quantitative trade-review workspace for futures and prop-firm traders, with MFE/MAE, R-multiple, Monte Carlo, drawdown, multi-account, and playbook-compliance analytics.
 - [VertData](https://vertdata.com) - Institutional-grade financial intelligence platform. Track 43K+ congressional trades (STOCK Act), SEC insider Form 4 filings, 25 superinvestor 13F portfolios, CFTC futures positioning, ARK ETF holdings, and short interest — all scored by AI for signal strength.
 - [KeepRule](https://keeprule.com/) - Curated library of decision-making principles and investment wisdom from masters like Buffett and Munger, featuring mental models for better investment thinking.
 - [Agent Toolbelt](https://www.agenttoolbelt.live) - AI stock-research API returning structured analysis (investment thesis, valuation verdict, insider-signal read, earnings, bull-vs-bear, moat, watchlist ranking) for US equities from Polygon/Finnhub/FMP data. Optimized for LLM agents; free tier.