GM currently stopped on the major 200 day moving average. The overall long term trend is up. Having a choppy climb from $19 since 2012 I think this is safe long play.
Buying once couple days of strength in bulls direction shown.
Selling if break and close for 2,3 days below that 200 ma
Weekly at mega support of 40ish. Breaking that would be a strong bear signal in which id go short.