NFT Price Drop Alert

WHAT IT DOES

NFT Price Drop Alert watches the current page for NFT listing prices, tracks price changes over time for specific NFTs or collections, and triggers alerts when prices drop below user-defined thresholds by a specified percentage or absolute amount, with visual and desktop notifications. The tool helps you identify buying opportunities by notifying you when NFT prices decline significantly.

WHERE IT RUNS

This tool works on any webpage that displays NFT listing prices, including NFT marketplaces, collection pages, and trading platforms. It automatically detects prices and NFT IDs from page content. The script runs on all websites as designated in its match patterns.

HOW TO USE

After installing the BotGentz extension, navigate to any NFT listing or collection page. Click the NFT Price Drop Alert icon in your browser toolbar or use the keyboard shortcut (Alt+P). The panel will open. Click "Connect Wallet" to connect your real EVM wallet extension—this provides network context. Configure your alert trigger type (Percentage Drop or Absolute Drop), set the drop threshold percentage or absolute amount, configure the check interval in seconds, and optionally enter a specific NFT ID to monitor. Toggle desktop notifications and sound alerts on or off. Click "Check Now" for an immediate price check. Click "Start Monitoring" to enable continuous price tracking. The panel displays the current price, previous price, and a log of triggered alerts. Use "Stop Monitoring" to pause tracking.

TECHNICAL SECTION — PRICE DETECTION AND DROP DETECTION ENGINE

Unlike simple price display tools, this tool uses a price detection and drop detection engine. It scans the page DOM using multiple strategies to detect listing prices—extracting prices from page text, identifying price-specific DOM elements, and recognizing pattern-based price data. Each detected price is associated with an NFT ID (either detected from the page or user-specified) and stored in a price history cache. The engine compares each new price against the previous observed price for the same NFT, calculating both the absolute drop in ETH and the percentage drop. When the drop meets or exceeds either the configured percentage or absolute threshold, the tool triggers multi-channel alerts. The engine maintains state to prevent duplicate alerts on the same price level, resetting only when the price moves further downward and crosses the threshold again. This approach provides reliable price drop detection without requiring external APIs.

THE PANEL

The panel is draggable anywhere on the screen and remembers its position per site. It can snap to the left, right, top, or bottom edges, or float freely. Collapse it to a small status indicator when you need more page visibility, and expand it again with a single click. Resize it vertically or horizontally to show more of the alert log. Press Escape to close the panel instantly. All settings (trigger type, drop threshold, drop amount, interval, specific ID, notifications, sound) are saved globally and persist across sessions.

PLEASE NOTE

This tool requires the free BotGentz extension and a real EVM wallet extension already installed in your browser. EVM chains only—supports Ethereum Mainnet, Polygon, Arbitrum, and Optimism. Wallet connection is read-only; this tool never initiates transactions or signs messages. Cannot detect price drops that occur between page refresh intervals, cannot access off-platform price data or historical price data beyond what has been observed locally, cannot detect price drops for NFTs not visible on the current page, and cannot alert on price changes that are not reflected in the page DOM. Users must manually verify price drops before acting on alerts. Websites change their layouts frequently; scripts may need updates, and we work to keep them current but cannot guarantee uninterrupted operation.