Tesla Motors Inc (NASDAQ: TSLA) shares have had an awful 2016. The stock, which closed last year near $240, is all the way down to the $150 range on Monday, February 8. Perhaps even worse for investors, a big name in the world of technical analysis just unveiled a bear thesis on the company in which he prefers buying General Motors Company (NYSE: GM) stock. So here's a chart comparing GM versus Tesla, which has been "building a massive base" over the long-term. It's possible current price movements in Tesla indicates both stocks are undergoing a "bearish to bullish reversal," as the pair broke out of a two-year downtrend line. GM isn't having a great 2016 either, but it is outperforming Tesla. The latter is down 36 percent year-to-date, while GM has fallen 16 percent this year. GM or TSLA?