RE:RE:RE:ProfitYo Pandora....there is no 'real logic' behind gaps but it seems that gaps (upwards or downwards) tends to be filled at one point or another. I've noticed over the years that the sooner = the better meaning that the sooner the gap is filled the less effect you have on the trend.
I'm sure you know about this but in any case, here's an interesting link that explains gap and it basically fit 100% with the DYA latest moves (gap up + huge volume).
Investopedia GLTA.