Whack-A-Mole Algo Is Back

It feels like it was just yesterday that the Whack-A-Mole algo in Earthlink was wreaking NBBO havoc (completely unsupervised mind you: it is not like anyone would expect the SEC to move its little finger to address this glaring Reg NMS 'outlier'). Wait, it was... Which probably explains why the very same algo is back in the very same name, at the very same time.

From Nanex:

Ladies and Gentlemen, who wants to play Whac-A-Mole today?

Yesterday (Aug 2'nd, 2011) we reported on the wild "Whac-A-Mole" algorithm. It appears it was not an isolated event as whac-a-mole was again spotted running in ELNK right after regular trading closed at 16:00.


Price Only:

Price and Size:

Scatter plot of trades only (Price and Size):

Zoom in of price and size activity:


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