How much is 2 HFT in dollars?

Excuse me, could you kindly clarify for me the current exchange rate of 2 High-Frequency Trading (HFT) units into US dollars? I understand that HFTs are not directly traded as a currency, but I'm curious about how much the value of two such transactions, if hypothetically converted, would be equivalent to in US dollars. Is there a way to estimate this, perhaps based on the average value or volume of transactions facilitated by HFT algorithms? Thank you for your time and assistance in this matter.