Index identifier, matches (base) cryptocurrency with quote currency
Allowed values: btc_usd, eth_usd, ada_usdc, algo_usdc, avax_usdc, ... (total 47 values)
Available options: ada_usdc, algo_usdc, avax_usdc, bch_usdc, bnb_usdc, btc_eurr, btc_usd, btc_usdc, btc_usde, btc_usdt, btc_usyc, btcdvol_usdc, buidl_usdc, doge_usdc, dot_usdc, drbfix-btc_usdc, drbfix-eth_usdc, eth_btc, eth_eurr, eth_usd, eth_usdc, eth_usde, eth_usdt, eth_usyc, ethdvol_usdc, eurr_usdc, eurr_usdt, link_usdc, ltc_usdc, near_usdc, paxg_btc, paxg_usdc, shib_usdc, sol_usdc, sol_usdt, steth_eth, steth_usdc, steth_usdt, ton_usdc, trump_usdc, trx_usdc, uni_usdc, usdc_usdt, usde_usdc, usde_usdt, usyc_usdc, xrp_usdc