# Exchanges and Pairs
Included are only exchanges supported by TradingView:
Many other top exchanges are not included, because they are not supported by TradingView.
The pair LTC/BTC is not included.
By default the spot exchanges are selected. You can select also the other margin trading and derivatives exchanges.
Feel free to share any ideas and issues you have.
# Open Source
The code is open source @ https://github.com/holofinance/aggregated-volume-crypto-tvi and uses the commonpine library https://github.com/holofinance/commonpine