This claim being made amongst calls from tiberiusiv that mircea_popescu is faking most of the activity on MPEx.
As shown by the preceding image, this activity did not actually ‘top’ the market. However, by looking at the volume presented by former image, one can see that there were more calls bought than bitcoins sold. To illustrate what this means, consider a simpler situation where this activity is conducted by a single person. Buying this many calls would be a fairly bullish move with a little bit of a hedge directly on the market. If the exchange rate holds or goes higher, this will be quite profitable.
In the end, the sale of a few thousand bitcoins in could’ve indeed signaled the top of this rally, but it didn’t. The interesting thing is that the source and motivation of this sale is probably shown in this post as options traders on MPEx giving themselves a little wiggle room in an uncertain market.
Charts courtesy of BitcoinCharts.com