Buy/Sell...midpoint21 Apr 2020 16:05
All this uncertainty over the fact that a calculation determines whether a transaction is a buy or sell based on whether it is above or below the mid point is a deliberate ploy to allow manipulation and promote doubt.... ;-0
A simple extra 8 byte column containing either a 'B' or 'S' would solve all this - but no, that would be too hard :-)