Stop getting excited about the $102. It's not a big deal. It's just ONE successful buy order.
Here is exactly what happened:
1. MTGOX member 1 wants to sell Bitcoin.
2. MTGOX member 1 states his selling price. In this case, he inputs: $102
3. MTGOX member 2 wants to buy Bitcoin.
4. MTGOX member 2 selects: immediate buy
... MTGOX searches for cheapest buy offer.
5. MTGOX member 2 finds member 1's buy offer.
6. Transaction complete.
He could have sold 0.0002 bitcoin for all we know for $102 - and it would have still showed up Bitcoinwisdom.
Last I checked for bitcoin wisdom to actually show the drop on the chart (and not the 'last offer'),
ALL buy orders up to that value have to be removed.