An example of a market listed on an exchange like Coinbase pro is
BTC-USD
which stands for Bitcoin quoted in US Dollar. Here, BTC is the base asset and its price is quoted in USD.
When identifying this market via the APEX:E3 API, the market type needs to be appended as follows:
BTC-USD:CRYPTO
Another example is ETH-USDT listed on Binance. Here Ethereum is the base asset and its price is quoted in USD Tether.
When identiying this market via the APEX:E3 API, the market type needs to be appended as follows:
ETH-USDT:CRYPTO
To view a growing list of supported markets, click here