Question about percentage increase/decrease

[bitcoinnurse]

Hello all,

Excuse my naivety. I have just started using coinbase..
When for example it reads a ‘+20.67% from today’. Does ‘today’ pertain to ‘compared to the value 24hours ago’ or the value since midnight. I’m comparing figures from say 22:50 tonight (I’m the the UK) and 22:50 last night and the percentages do not correlate. Nor however do they when calculated from midnight,

Could someone kindly explain?

Thanks

[TryNinja]

In 24 hour markets High and Low usually mean "highest/lowest price in last 24 hours".

Open generally refers to the price at 12:01 AM UTC of any given day and close generally refers to the price at 11:59 PM UTC of any given day.

https://bitcoin.stackexchange.com/questions/41055/bitcoin-market-hours-open-close-prices

HitBTC for example:

[...] a new day starts on 0:00 UTC (or 12:00 AM).

https://forum.hitbtc.com/discussion/310/bitcoin-market-hours-open-close-prices

[xnightly]

Usually it's the price -24 hours ago. so 20%+ in 24 hours would mean, if something was $10 yesterday  at 5pm, it would be 12$ today at 5pm, for a 20%+ increase day over day.