I have the following timeseries and unfortunately no other information except time and holidays.

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What methods could work for a probabilistic forecast of this? I thought about some regime changing model. How could i detect the regimes?

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  • $\begingroup$ You're more likely to get people to look at your question if you use an informative title. $\endgroup$ – mkt - Reinstate Monica Sep 27 at 8:44
  • $\begingroup$ With the frequent zeroes you could use an intermittent model like Croston’s, but there’s claearly some kind of event here as you mention with regime change. How can you not have any data on what drives these pulses? Do you, or someone else, know at least in hindsight the cause? $\endgroup$ – Chris Umphlett Sep 27 at 10:09

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