We have coded a websocket script getting orderbook & execution data direct from the exchanges Binance, Kraken, and Coinbase -- checking for executions between bid/ask, i.e., potential fake volume.
The results may surprise you, see source here:
github.com/Whalepool/Bitc
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Dark pool markets don't publish order book or trades. They're separate from the lit markets and aren't counted in any publicly available volume figures.