How does that chart and black line possibly represent an upward...

How does that chart and black line possibly represent an upward forecast? Has that been empirically validated ? I havent seen charts being graffitied with lines since the bitcoin craze when people would try and hype up prices movements using their own 'expert' line drawing Should at least perform ARIMA or GARCH on time series. Or model price forecasts using a random walk (brownian) with a drift component. There are numerous quant finance firms that would be modelling prices using methodologies that are reputable and can provide you with more assurance. In any case zinc prices are not perfect correlated to share prices - there are a heap of other risk factors that drive performance of zinc producers. Most factors are non-linear.