Until the end of 2017, dark liquidity could be found in either MTFs or Broker Crossing Networks. MTFs remain part of the execution landscape today, but now they exist alongside a variety of other venues and order types; all providing liquidity that, even if not strictly dark, certainly matches the profile of dark liquidity as most understand it. Systematic Internalisers, Periodic Auctions, Hidden LIS Orders and Conditional Orders are still seeing growth today and new sources of liquidity continue to be launched.