All time high volume means all time high price shortly? 
Um, no. Go ahead and look at the all time price/volume history on bitcoin charts. All the major volume peaks are followed by crashes, then long periods of correction, followed by stagnation. So, you know, yay!
That's good if there is a stagnation at 15-16 level, so I can accumulate more
you can accumulate with everyone else when it stagnates at the bottom, likely bellow 10$
it shouldn't be to hard to spot the stagnation period....