This is a long term chart of the German Stock Index Dax. The upper trendline was established at the pre Financial Crisis peak in 2007 and later at the peaks of 2015 and 2017. This were good selling points. The lower support trendline is giving support since the Creek Dept Default Crisis in 2011 and fears of a China Slow Down in early 2016. This were good buy points. Recently, the trendline was testet again on fears of a Trade War with China, Brexit and Italian Credit, which presents a buying opportunity als long the support trendline stays intact. Otherwise danger ahead, because of a huge rising wedge pattern of a historical size.