Parallel, P2P and reference rates
Where a parallel (black-market) dollar rate is published openly, it is shown next to the USDT P2P price and the reference rate. Today that is Argentina; other countries are added only with a public source.
Argentina · ARS per US dollar
P2P vs blue: – · P2P vs reference: –. Blue rate from dolarapi.com.
ARS P2P premium over the reference rate, daily
The daily line starts with the first day this site read the books; there is no back-filled history.