GRPN is quite far away from SMA 200. I can also see head and shoulders formation over here. If valid, profit target would be around 7.50 USD. This level was important in the past. At this level, closer to the SMA 200 I would buy the stock for a long term investment. So the short would kinda speculative for me, long at around 7.5 great entry for 1+ year investment.
In my opinion, there might be h&s pattern developing on the NVDA stock. If so, then the profit target (neckline to head extended down from neckline) should be like 310 USD. It makes sense to me, because it would close the gap and bring us closer to that 200 SMA.