The "RED/USD" trading pair doesn't correspond to a widely recognized cryptocurrency as of current knowledge (up to July 2024). Here's a breakdown of possibilities and steps to verify:

1. **Check for Typos or Misinterpretations**:

- **ReddCoin (RDD)**: A social media-focused cryptocurrency, but its ticker is **RDD**, not RED.

- **RED Token or Project**: If "RED" refers to a specific project, verify its legitimacy through:

- **Official website** and whitepaper.

- **Social media** (Twitter, Telegram, GitHub).

- Listings on **CoinMarketCap**, **CoinGecko**, or exchanges like Binance, Coinbase, or Kraken.

2. **New or Niche Projects**:

- Some tokens are launched on decentralized platforms (e.g., Ethereum, BSC, Solana) and may not be widely listed. Use tools like **DexScreener** or **DeFiLlama** to search for RED on decentralized exchanges (e.g., Uniswap, PancakeSwap).

3. **Caution**:

- Be wary of scams: Verify audits (e.g., CertiK), liquidity, and community activity.

- Avoid sharing private keys or connecting wallets to untrusted sites.

4. **Alternative Interpretations**:

- **Stock Tickers**: RED might refer to a stock (e.g., Redfin: RDFN), but "coin" implies cryptocurrency.

- **Reddit Community Tokens**: Reddit uses tokens like MOONS (on Arbitrum), but not RED.

**Next Steps**:

- Search for "RED coin" on CoinMarketCap/CoinGecko.

- Check if it’s listed on exchanges you trust.

- Research the project’s team and use case.

If you have more context (e.g., blockchain platform, project name), feel free to share!