You cannot tell from the course of sales as, if i understand correctly, sales are listed by the seller's amount of units sold (to a buyer) and not as how many bought by an individual, for example if i buy 350 U CBA @ market, and 345 are @ $29.95 and 5 are @ $29.94 then the 5 @ $29.94 appear as a separate sale (less than $500) but they are part of a larger parcel bought. This is my understanding - if any one knows better happy to be corrected and updated.
