1 btc = 1 btc.

but this is a very cool feature to be replaced in bots which are using kind 1 in public feeds. it helps to make them organized! ack.

For reference I've been publishing BitcoinAverage prices for about a year under kind 1009

It has tags like this:
["d", "BTCUSD", <ask>, <bid>, <low>, <high>]

nak req -k 1009 -l 1 --stream wss://relay.snort.social

@v0l what time range do you use for the low and high?

Are those from book orders or from final sales?

@v0l what time range do you use for the low and high?

Are those from book orders or from final sales?

It depends on the candle's configured time. I think the simplest thing to do is to use a 1-minute period, which is the smallest and can be calculated later on. The Exchange saves all transactions for 1 minute and generates the candle with the values mentioned above.
You also need to know the Exchange where the candle was generated, as it can vary from Exchange to Exchange.