[josh2600]

As a fund manager, I wish there was a data warehousing service I could pay for with a queryable by the minute (or better granularity) API that captured multiple exchanges across multiple countries for the top 50 coins.

I would pay a lot monthly for that product. Such a pro-level service doesn't exist at all yet.

Also there aren't any derivatives or futures to speak of yet (don't point out the existing futures markets, they have no volume).

Source: I run CryptoLotus, a crypto hedge fund.

[mayank]

If you're interested in building this, you can easily stream data at any scale into Google's BigQuery [1] from any number of clients, using simple HTTP POST requests, and then have a single SQL-queryable interface to that data.

[1] https://cloud.google.com/bigquery/streaming-data-into-bigque...

[jameskegel]

Reading what you describe, I think Coinigy does this currently. I have a premium account and use it as an 'exchange aggregator' for my trade portfolio, to trade on and trade between many different exchanges with many trade pairs, and I believe it offers an API so that I could essentially abstract their frontend from the process. I pay about 20 dollars a month.

[LrnByTeach]

Yes, Good source for BTC historical data

https://www.coinigy.com/bitcoin-data/

[josh2600]

BTC is easy. There are a million sources for it. The altcoins are the hard ones.

[jameskegel]

Which trade pairs are you looking for that Coinigy doesn't track and service already?

[scottlocklin]

There's at least two of these: https://www.coinapi.io/ https://cpxtrading.net/news/

[josh2600]

CPX doesn't have the breadth of exchanges I'm looking for. CoinAPI is interesting. I'll play with it and give you an opinion.

[scottlocklin]

I know the guy who did it a little; it's new, but if you have requirements, ping him and he'll probably fix it for you.

[bcherny]

What do you think of Bitmex?

[josh2600]

The bitmex founder is brilliant. Read their newsletter, it's some of the best writing in crypto.