Medium model from 2012: downtrend from 2012 to 2015 and on, with a local high at beginning of 2014.
Adding Short model from 2012: Short model correlates with Medium model and the price until start of 2013. 37 more words
Implementing Medium model since 2012. Shows a long decline still end of 2014.
Implementing Medium model and comparing from 2012 (brown), 2013 (dark green) 2014 (green) and 2015 (red) shows the model is consistent along the years, no inverse happened, 120 more words