Collect historical price data from Polymarket Up/Down markets into Supabase

This workflow automatically collects historical price data from Polymarket Up/Down markets and stores it in Supabase, creating a structured and query-ready dataset for analysis. By continuously fetching price movements from prediction markets such as Bitcoin, S&P 500, and other Up/Down series, the automation enables reliable historical tracking without manual intervention. The data is normalized and persisted in Supabase, making it easy to run SQL queries, build dashboards, perform quantitative analysis, or integrate with analytics and AI pipelines. This setup is ideal for traders, data analysts, and developers who need accurate Polymarket price history for research, strategy testing, or lon

Help me set up the n8n workflow "Collect historical price data from Polymarket Up/Down markets into Supabase" (https://n8n.io/workflows/12823). It uses: HTTP Request, Supabase. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.