I think he is buying now - the walls make it possible to buy cheap. Then he'll remove the bidwalls and it should go up. Hard to predict when he plans to sell - does he think that it will quickly break 7.2 and shoot back to double digits? Or will he start slowly selling immediately - so that he'll manage to sell everything when the rally stops around 5.5 and the price falls back down?
I think there are a lot of leftover ask walls from the first rally, so this one will unfortunately have to stop short of 7.2 on its first wave, unlike the first rally (back then there was only 15k BTC every $1 up).