What is coinbase-trading-api?

This project is a trading bot for Coinbase's Advanced Trade API, written in TypeScript and built to run on Node.js version 20 or later. It follows a systematic trend following strategy based on exponential moving averages, commonly called EMAs, rather than any kind of automated prediction or artificial intelligence. The strategy compares a shorter EMA against a longer EMA on candle closes. A buy signal happens when the shorter EMA crosses above the longer one and the price is also above a long term trend filter EMA, which defaults to a 200 period average. A sell signal happens when the shorter EMA crosses back below the longer one. The bot also calculates and logs the Average True Range, a measure of price volatility, on every cycle, which a user could use to add features like stop losses later. Paper trading, meaning the bot only logs what it would have done without placing real orders, is turned on by default. Placing live orders requires explicitly opting in through a single configuration flag. Risk is controlled through a per trade risk fraction and an optional maximum amount per order, both set by the user rather than guessed by the bot. Configuration is read from an .env file and validated at startup using a library called Zod, so invalid settings are caught immediately instead of causing problems later. To run it, a user installs dependencies with npm, copies an .env file with their Coinbase API keys and settings, and starts the bot with npm run dev, which runs the TypeScript source directly, or builds it first with npm run build and runs the compiled output with npm start. The README links to three related projects in the same family: a Binance spot trading bot, a Bybit trend following bot, and an AI based trading agent. It also states plainly that the project does not promise profits, that trading involves risk of loss, and that the user is responsible for their own API keys, fees, and compliance with Coinbase's terms and local law.