A dark pool is a private securities exchange where institutional investors can buy and sell shares without revealing their identities to the rest of the market. This allows them to trade large blocks of stock without spooking other investors and driving up the stock’s price.
The data in a dark pool is not made public, so it is difficult to say exactly how much volume is traded in them. However, they are estimated to account for between 10 and 15 percent of all U.S. stock trades.
Active Trader Pro is not capable of reporting big block trades or dark pool prints. As a result, you won’t be able to see where large dark pool money is buying and selling on the platform.
Fidelity did confirm that some dark pool orders can take place through their intelligent router called FDLM (Fidelity Capital Markets).
Some services, such as FlowAlgo, will report dark pool data. However, they do not report them in real-time, but rather after 1-2 trading days.