I'd like some guidance on which method I can use to better match the peaks in any time series data than the troughs.
For example in the following figure
the dashed line is the actual sales data, and the blue line is a regression fit.
I'd like a process/method by which I can better match the peaks of the dashed line, even if it is at the expense of a poorer fit to the troughs of the dashed line.
I hope the question is clear. I'd greatly appreciate any guidance on this or links to any articles/papers that might help. Thanks.