Collection Offer vs Floor Comparator

WHAT IT DOES

Collection Offer vs Floor Comparator watches the current marketplace page for NFT collection listings, reads the collection's floor price and the highest collection offer from the marketplace or contract via eth_call, calculates the percentage difference between the floor price and the highest offer, identifies arbitrage opportunities where offers exceed floor price, and displays alerts with collection details, floor price, highest offer, difference percentage, and execution recommendations when favorable offer-vs-floor disparities are detected. The tool scans the page for collection listings, reads floor prices and highest offers, calculates the percentage difference, identifies arbitrage opportunities, and provides recommendations.

WHERE IT RUNS

The tool runs as a panel inside your browser on OpenSea marketplace pages at https://opensea.io/*. It works on any OpenSea page displaying collection listings. The tool connects to your real EVM wallet extension (MetaMask, WalletConnect, or any wallet injecting window.ethereum) to read on-chain data via eth_call and the ethers library loaded at runtime. No data is sent to any external server; all reads happen directly from the blockchain through your wallet provider.

HOW TO USE

Install the BotGentz extension, navigate to OpenSea with your wallet connected, and open the Collection Offer vs Floor Comparator panel. Set your minimum difference threshold percentage (default 5%) — the tool will only flag collections where the offer exceeds the floor price by this percentage. Select your offer validity filter from the dropdown — All offers or Active only — to control which offers are considered. Choose your alert preference — Panel only, Browser notification, or Both. Toggle "Auto-check on page load" if you want the tool to analyze automatically when you open the panel. Click "Compare" — the tool scans the page for collection listings, reads floor prices and highest offers, calculates the percentage difference, identifies arbitrage opportunities, and displays a comprehensive analysis with recommendations. When favorable offer-vs-floor disparities are detected, the tool triggers alerts with collection details and price differences. Click "Refresh" to manually update the comparison analysis.

MECHANISM — OFFER VS FLOOR COMPARISON WITH ARBITRAGE DETECTION

This tool uses an offer-vs-floor comparison engine that identifies arbitrage opportunities in NFT collections. The system first connects to window.ethereum and requests the user's wallet address. It scans the page for collection listings using DOM selectors for item cards and listing details, extracting collection contract addresses. The tool reads the collection's floor price from the marketplace or contract via eth_call, then reads the highest collection offer from the marketplace order book. It calculates the percentage difference: diffPct = ((highestOffer - floorPrice) / floorPrice) * 100. The opportunity classification uses a multi-tier system: OPPORTUNITY (diffPct ≥ threshold and highestOffer > floorPrice), MODERATE (some conditions met), or NOT FAVORABLE (conditions not met). Recommendations are generated based on the comparison, helping users identify arbitrage opportunities where offers exceed floor prices.

THE PANEL

The BotGentz panel is fully draggable, allowing you to position it anywhere on your screen without obstructing the OpenSea interface. It includes per-site position memory, so the panel returns to your preferred location each time you visit the marketplace. Snap-to-edge functionality lets you dock the panel to any side of the browser window. The panel collapses to a compact icon when not in use and expands with a single click. You can resize it to your preferred dimensions, and pressing the Escape key instantly closes the panel. All interactions are smooth and intuitive, designed to work alongside your NFT trading workflow.

PLEASE NOTE

This tool requires the free BotGentz extension and a real EVM wallet extension (such as MetaMask) already installed in your browser. EVM chains only — currently supports Ethereum mainnet. This is a monitoring and analysis tool only — it does not execute trade transactions automatically. The tool cannot guarantee that the displayed prices match the exact moment of execution due to market changes. It cannot account for slippage or price impact during execution. It cannot read order book data from marketplaces not supported by the tool. It cannot verify offer validity or authenticity. It cannot predict future price movements or market trends. It cannot read private wallet information or trading intentions. All blockchain reads are performed directly through your wallet provider; no data is stored or transmitted beyond your browser. Websites change their layouts and content structures regularly; while we continuously update the extraction logic, some pages may require script updates. Always verify all collection prices, offer details, and arbitrage opportunities independently before taking any action based on the dashboard.