Useful links

Futures volumes quick scan: https://www.barchart.com/futures/most-active/indices

Futures heatmap: https://www.barchart.com/futures/heat-map

Futures heatmap another source: https://finviz.com/futures.ashx

Comparising assets performances: https://www.barchart.com/futures/heat-map

20 years forex chart: https://www.barchart.com/forex/quotes/%5EEURUSD/interactive-chart

Global view

https://liveindex.org/futures/

https://www.investing.com/charts/real-time-indices-charts

Trading hours : https://www.ig.com/en/help-and-support/cfds/market-details/what-are-igs-dealing-hours

Correlations

Currency: https://www.myfxbook.com/forex-market/correlation

Commodities: https://take-profit.org/en/commodities-market-rates/

Currency - Commodities: https://take-profit.org/en/currency-correlation/

United States

CME Liquidity Tool

This tool is primarily used to calculate average cost-to-trade statistics for given lot sizes. In times of elevated market volatility, users may want to normalize the tool’s output with expanded daily price ranges for better context around holistic liquidity analysis of supply, demand, and market conditions in the current environment.

https://www.cmegroup.com/tools-information/cme-liquidity-tool.html

CME Exchange products volumes and Open Interest

https://www.cmegroup.com/market-data/volume-open-interest/exchange-volume.html

Price Action Alerts: https://www.cmegroup.com/price-action-alerts.html

Today's most active options: Stocks, Index and ETFs :

https://www.optionseducation.org/toolsoptionquotes/today-s-most-active-options

Unusual stock options activity

https://www.barchart.com/options/unusual-activity/stocks

https://www.optionsonar.com/unusual-option-activity/FB/latest-trades