This has existed in various forms for more than 10 years. Nasdaq I believe has 3 or 4 discrete intraday crosses in addition to the opening and closing cross. Yo

This has existed in various forms for more than 10 years. Nasdaq I believe has 3 or 4 discrete intraday crosses in addition to the opening and closing cross. You don't want it to be random since participants need certainty about when the cross will occur. In addition there are a variety of venues that allow block trading in various forms that market participants can use.