# SPECTRE Markets > SPECTRE Markets publishes free daily dealer-gamma (GEX) and market-structure levels for NQ, ES, gold and crypto, computed from public data before the open. The free tier covers the prior-day high and prior-day low on every instrument. The session regime, the HVL (gamma flip), Call Resistance and Put Support exist only on the instruments that carry options gamma (NQ, ES, BTC and ETH), and whether a given session publishes any of them free is a tier condition rather than something this document can promise; GC ships market-structure levels only. What a given session actually published free is in the public levels API below. Also free: an excerpt of the AI desk read and today's ranked price paths with trade ideas; the full level board is free with an account. Every past session's board is public in a dated archive, and NQ, ES, BTC and ETH sessions are graded in public. Research and education, not financial advice. ## Learn - [Learn: index of every guide](https://spectre.markets/learn) - [Gamma levels](https://spectre.markets/learn/gamma-levels) - [Gamma flip and walls](https://spectre.markets/learn/gamma-flip-and-walls) - [Gamma flip](https://spectre.markets/learn/gamma-flip) - [Call wall](https://spectre.markets/learn/call-wall) - [Put wall](https://spectre.markets/learn/put-wall) - [Trading NQ ES levels](https://spectre.markets/learn/trading-nq-es-levels) - [How we grade levels](https://spectre.markets/learn/how-we-grade-levels) - [Ninjatrader key levels](https://spectre.markets/learn/ninjatrader-key-levels) - [Tradingview key levels](https://spectre.markets/learn/tradingview-key-levels) ## Data - [Homepage: today's free board and desk read](https://spectre.markets/) - [Dated levels archive (every past session)](https://spectre.markets/levels) - [BTC levels archive](https://spectre.markets/levels/BTC) - [ETH levels archive](https://spectre.markets/levels/ETH) - [ES levels archive](https://spectre.markets/levels/ES) - [GC levels archive](https://spectre.markets/levels/GC) - [NQ levels archive](https://spectre.markets/levels/NQ) - [BTC levels today](https://spectre.markets/levels/BTC/today) - [ETH levels today](https://spectre.markets/levels/ETH/today) - [ES levels today](https://spectre.markets/levels/ES/today) - [GC levels today](https://spectre.markets/levels/GC/today) - [NQ levels today](https://spectre.markets/levels/NQ/today) - [Embeddable levels widget](https://spectre.markets/embed): free, no signup: a copy-paste widget showing the gamma trio only on instruments that carry options gamma and only where that session's trio rows are free — where they are member-tier the widget says so rather than drawing blanks; on GC, which has no options source, the widget discloses that and ships market-structure levels only; what a given session publishes free is in the public levels API below - [Public symbols API](https://spectre.markets/api/markets/public/symbols): free, no key: every instrument we publish, with its asset class and the date of its latest published session (which may be older than today) - [Public levels API (NQ)](https://spectre.markets/api/markets/public/levels/NQ): free, no key, rate-limited JSON - [Public session-paths API (NQ)](https://spectre.markets/api/markets/public/paths/NQ): free, no key: today's ranked price paths with their trade ideas - Past sessions: https://spectre.markets/levels/{SYMBOL}/{YYYY-MM-DD} (one permanent page per past session; the CURRENT session is not in the dated archive while its full board is tier-gated — read it at https://spectre.markets/levels/{SYMBOL}/today) ## Methodology & track record - [Methodology](https://spectre.markets/methodology) - [How to](https://spectre.markets/how-to) - [Public data studies](https://spectre.markets/studies) - [Study: Crypto taker imbalance](https://spectre.markets/studies/crypto-taker-imbalance) ## Optional - [Tradingview charts](https://spectre.markets/blog/tradingview-charts) - [Tradingview](https://spectre.markets/tradingview) - [Charts](https://spectre.markets/charts) - [Contact](https://spectre.markets/contact) - [Legal](https://spectre.markets/legal) - [Legal: Terms](https://spectre.markets/legal/terms) - [Legal: Privacy](https://spectre.markets/legal/privacy) - [Legal: Risk](https://spectre.markets/legal/risk) - [Legal: Cookies](https://spectre.markets/legal/cookies) - [Legal: Acceptable use](https://spectre.markets/legal/acceptable-use) - [Legal: Community rules](https://spectre.markets/legal/community-rules) - [Terms fr](https://spectre.markets/terms-fr) - [Privacy fr](https://spectre.markets/privacy-fr)