How do I embed a financial chart in a Substack post?

The current options

Substack supports three main methods for embedding charts: their built-in TradingView integration, Datawrapper embeds, and generic iframe embeds from any source.

Method 1: Substack's native TradingView

Substack has built-in support for TradingView financial charts. Just paste a TradingView symbol and it renders inline. Limitation: only basic stock/crypto charts. No vol surfaces, yield curves, or custom data.

Method 2: Datawrapper

Datawrapper is the most popular chart tool among newsletter writers. Paste a Datawrapper embed URL and Substack renders it. Limitation: no finance-specific chart types. Great for bar charts and line charts, weak for options, rates, or derivatives data.

Method 3: Quadesto

Quadesto generates finance-aware charts that embed anywhere via iframe. Paste the embed URL in Substack and you get interactive yield curves, volatility surfaces, FedWatch probability trees, and 30+ other chart types that TradingView and Datawrapper can't produce.