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You'll want to use the Twitter public timeline firehose - https://dev.twitter.com/docs/api/1.1/get/statuses/firehose

Insert any matching bitcoin into your database with the associated time. Then you can sum/avg/aggregate it by time (within [epoch seconds] - [epoch seconds + 3600])

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I think its hard/expensive to access the firehose no?

Wasn't much of an issue for me but since he is somewhat new I imagine reading a stream and basically doing an infinite foreach would be a tad easier than adding queuing, API ratelimits (per hour? forget which), timed polling, etc.

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