I know this might be a very mathematically retarded question, but I am trying to find out the price of ETH and the altcoin at the time I bought them from completed order history. All it shows is the ratio of ETH/Altcoin, number of units got and bid/ask etc.

enter image description here

  • The price of ETH and the alt coin denominated in what unit? In US dollars?
    – lungj
    Commented Aug 30, 2017 at 20:21
  • when do eth price down.sr ? what do i do ,that i know price eth,rep in the future
    – REP
    Commented Oct 1, 2017 at 19:01

1 Answer 1


It depends what you mean by "price".

All it shows is the ratio of ETH/Altcoin...

That is the price. The cost of one currency in another.

If by price you mean "how much it was worth in dollars1", then in my opinion it's time to start re-thinking - or at least expanding - your definition of price. As with the "value" of one cryptocurrency in relation to another, the "value" of a dollar is always changing, just perhaps less so. When you see the value of your cryptocurrency rising, how do you know it isn't because the value of the dollar is decreasing? And so on.

Your next problem is that different exchanges will trade at different "prices". Poloniex prices won't be the same as Kraken prices - they're two distinct markets, and the price is set by market demand.

In a less abstract and pedantic world you could find the value of each of the currencies in the pair, in dollars, at that particular time.

To do this you could look at the ETH-USD and Altcoin-USD charts on the exchange you used, and work out the per-unit cost - e.g. one ETH was worth X dollars, one altcoin was worth Y dollars.

Either that, or find an average value from using an API from a service that amalgamates prices across all exchanges (e.g. Coinmarketcap.com or Cryptocompare.com - APIs here and here.)

[1I've used dollars in this example, but insert your own fiat currency accordingly.]

  • Thanks Richard, I dont have enough credentials, otherwise would have definitely upvoted. :)
    – hitman99
    Commented Oct 4, 2017 at 22:25

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.