You look at the chart and think:
"Wait, the price is the same as before, but the variation is different..."
This happens for a simple reason:
The percentage is always relative to the price from 24h ago — not to the price from minutes or hours ago. In the cryptocurrency market, there is no opening and closing.
Practical example
At 3 PM yesterday, the price of BTC was $105,000, now it is $107,000 → variation of +1.9%.
But...
30 minutes ago, BTC was also at $107,000, but the variation was +2.1%
Why?
Because the point of comparison (24h ago) is updating every minute.
That is, what was '24h ago' changes all the time!
Conclusion
The percentage variation does not compare the current price with the price from 1 hour ago, but rather with the exact price from 24 hours ago.
That's why the value may be the same, but the percentage changes — because the 'starting point' has changed.
