Buy versus sell pressure over the last hour or 24 hours, from the live trade tape

Volume in QU and units, and number of trades, that were buys and sells, and the net pressure (buy QU minus sell QU, over their sum: +1 all buying, -1 all selling, null if nothing with a known direction traded). Direction is that of the party who started the trade. Trades whose direction is not known are counted in unknown and left out of the pressure. partial is true when the tape has not covered the whole window yet (it was started or refilled later).