Plots in a single indicator the Bitcoin RSI of multiple exchanges. The selected exchanges are Bitmex, Binance and Coinbase. The reason is that these are the ones with the highest 24h volume (coinmarketcap) and have a ticker available in Trading View.
One drawback with this indicator is that it doesn't automatically adjusts its resolution when the Bitcoin chart is rendered across timeframes. You have to manually update the time resolution in the settings window for the indicator.