It's not where, but when. Wherever the price is at around 8 PM Eastern time on Monday... that's the price to buy at.
why? The bid volume is much greater than the ask volume and that haven't stopping the price from slowly droping? Why would it suddenly go up on monday.
This is a long weekend in Japan, from Friday to Monday. The next working day there is Tuesday, so the Japanese banks will be closed until then. That means there cannot be any new fiat (dollars, euros, yen) going into MtGox for another three days. Now, there could be money sitting in MtGox but not on the order books... just like there could be BTC there and not on the books. We don't know how much of each there is. But we do know that for the next three days BTC can move in and out of Gox easily, fiat can't. That puts downward pressure on the price, until the banks open Tuesday morning and people start seeing their deposits going through.
if the price is 103 on monday you're still buying right?