Today I was trading Harmon (HAR) and half of its volume was done on the NAS, and it was done in 3 blocks...2 of them were big blocks (46k and 185k) . To all the tape readers out there...how do you interpret action like this. All of them were done on what would have been plus ticks on the NYSE. I'm trying to figure out what significance to put on this action...besides just the pure size of the blocks. Any thoughts?