Add Indodax (#2218)

README.md

@@ -320,6 +320,7 @@ API | Description | Auth | HTTPS | CORS |
 | [FTX](https://docs.ftx.com/) | Complete REST, websocket, and FTX APIs to suit your algorithmic trading needs | `apiKey` | Yes | Yes |
 | [Gemini](https://docs.gemini.com/rest-api/) | Cryptocurrencies Exchange | No | Yes | Unknown |
 | [ICObench](https://icobench.com/developers) | Various information on listing, ratings, stats, and more | `apiKey` | Yes | Unknown |
+| [Indodax](https://github.com/btcid/indodax-official-api-docs) | Trade your Bitcoin and other assets with rupiah | `apiKey` | Yes | Unknown |
 | [Kraken](https://docs.kraken.com/rest/) | Cryptocurrencies Exchange | `apiKey` | Yes | Unknown |
 | [MercadoBitcoin](https://www.mercadobitcoin.net/api-doc/) | Brazilian Cryptocurrency Information | No | Yes | Unknown |
 | [Nexchange](https://nexchange2.docs.apiary.io/) | Automated cryptocurrency exchange service | No | No | Yes |