Best Buy $BBY has been trading in a slightly bullish channel in 2018, but has also been in a bullish trend since the second half of 2016.BBY Daily Chart(click to enlarge)Showing Some Weakness at Support:- First of all, note on the weekly chart below that the market has been in a bullish swing since mid-2016, following a a more than 2-year triangle consolidation.- Now, looking back at the daily chart, we can see that price is not only at the 2018 channel support, but also at the rising trendline support from June 2016.- This is indeed a critical support, and we already saw buyers here earlier in October when price stayed above $70.- However, note that price was rejected at $75, which is in the middle of the moving average cluster (200,100,50). - This suggests bears are in charge and warns us against relying on the $70 support this time around.Next Support:- Assuming a break below $70, we might still find support around $65 (2018-low).- Otherwise, we can look at the top of a previous consolidation, the $60-$62 area, as potential support. This would also test the 100-week simple moving average (SMA) for potential support.BBY Weekly Chart(click to enlarge)