MNTA confirmed a SELL signal today (got it yesterday - confirmed today) on heavier volume than the bottom was made - trades now favor the short side - support now $10.00 and $9.80 which is good.
It will need some real news now to overcome any tax loss selling into year end.
Last SELL signal I got on MNTA was when we dumped it 9/18th in the high 11's. It's a fairly reliable indicator for a stock being over bought.