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I am using popular Coinmarketcap API request:
https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest?limit=100&convert=ETH
In response percentChangeFor24h and some other parameters are always different from what is show on coinmarketcap.com. Do I miss something or data is just irrelevant? Could it be from timezone? I have not found any way to change timezone into requests itself.
If you go to the coinmarketcap.com site and reload the page several times at about 1 second apart you'll see that the volume does not change. This means there's a cache, since there's definitely thousands of trades every second. The API, on the other hand, is probably not cached. This must be the source of the difference you see. – Jose Fonseca – 2019-10-14T15:07:08.537