It currently shows the premium for BTC & ETH.
If it's positive (red) it means that the Korean market is trading at a premium.
Vice versa negative (blue) means the West is trading at a premium.
Because the Korean crypto market is so closed off (because of regulations) the premium sometimes gets really wild.
The Korean average is based on Bithumb & Korbit prices.
The index made for the west is based on Coinbase, Kraken and .
By default it uses closing prices for the calculation but you can change that.
You can also change the timeframe in the settings although it's probably best that you keep it at "same as chart".
It's free so you can just add it to your favourites and start using it.
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.
If you want access to one of my invite-only indicators send me a personal message.