Hal(non public) can estimate about 90% Zeev's buying of the Q before Zeev's posts it. Zeev uses "the box" and a reversal on either one minute of 5 minute chart.IMHO.
Hal(non public) is very poor about estimating Zeev's sell of the Q. Zeev uses a key stock to sell the Q and it keeps on changing over time.IMHO.