ADXS seems like a much better deal than ACTC at it's current PPS & MC and has been on my radar. Still you have to take profits when they come as further dilution is in the cards for both companies. Neither is a long term hold, IMO, given their dilutive nature.
Right now ACTC seems way overbought, and I'm looking for lower prices to even consider buying for a trade. Their recent news was positive in my mind, but it wasn't what people were looking for and should mean that the PPS continues to dip, IMO.