The next chart is monthly. Notice how the volume has continued to grow since the 1990s. This is program trading and not true volume. When program trading and Im lumping in all computerized trading into the group, becomes the majority of trading volume the index is subject to short term manipulation. And with one firm controlling over 50% of the volume it is stupid to believe it is not going on. When the NYSE tells us the Flash Crash had no reason for it to occur is a blatant lie. They know exactly why it occurred but remember they will protect the members at all costs because the members own the exchange. The exchange makes its money from volume so anything that generates more volume is good for Wall Street. We need to see if Fridays support was real.
Notice the congestion just after the high. This is normal for a bear trend as distribution or if a bull trend, as a base. You can see the 2000 high had the same congestion. I wish I could say a monthly high should not be broken as occur then but other tops have exceeded the congestion highs and turned down. But the point is this does not rule out a top. There is a distinct lack of distribution at the high so again this would be normal.