When it comes to 24h Change on a specific Pair,
How is this calculated?
If it's price at current time compared to price 24 hours ago, then for example:
the current price of BTC 9431
now (6/16/2020 5pm) is compared to the price of 9357
on 6/15/2020 at 5pm?
and an hour later (6pm) if I see it again will be compared to the price on 6/15/2020/6pm?
I refer you to this link: https://bitcoin.stackexchange.com/questions/67438/24-hour-price-change-mean
The 24h % change is the difference between the current price and the price 24 hours ago.
The current price of bitcoin is $14988 and was $14937 24h ago. So the 24h change is +0.3%, even if there was a huge spike between this period of time.