How to analyse a charet for "When should I buy something?"

eminusboy

Member
Hi,
I have a chart that I would like to analyse for the question "When should I buy a new boiler system?". I'm trying to interpret this chart on my own, but would appreciate some help on answering questions related to the best time to make such a large purchase.


What things on a chart would indicate optimal times for a large purchase?
Or what things on a chart would indicate how long to wait before going ahead with such a purchase?


Thanks.
 
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