the difference in types of openings is not just a probe in one direction then a reversal. it is the tempo .. how fast the market moved or conviction. if it slowly grinds in one direction for one or two 30min, bars ..that is a opening rejection...if it sprints there fast like a opening drive then the brakes are slam-ed on. that is a opening test drive. there is most of the time a 3 or 4 tick leak with small prints going through the reference point. with the rejection it my stall or retest the reference be for it reverses ....hope it helps
if you want to find out more on the differing opening types, there are plenty of videos on Youtube or you could look online for a PDF of dalton's book/s. They're there. They would help you to discern the differing opening types.