PPU Suggestion: add a button for moving back and forward a month

[brianmackenna]

We have had the following from a user

I am having a good play with some of the data on your website, in particular PPU For my CCG you give November 2018 data and potential savings. Is there any way of providing data over a time period e.g. April to November 2018? I don't know how much the data fluctuates much on a monthly basis, as we do see quite big swings on a month by month basis I guess what I'm asking is are the November savings data reflective of the true picture for the previous 6 months?

We have given instructions on how to add the month to the url as a work around however should we consider

• Aggregating over a three month period
• Adding a drop down to select the month of interest

In one CCG dashboard I did notice Ramipril Caps/Tabs appear. They run very close together in the drug tariff (before concession applied - so aggregation might help with removing that)

[sebbacon]

From discuss yesterday: aggregation doesn't feel like the right solution to the problem. A convenient fix which is possibly Good Enough is just to allow selecting the month of interest.

Note we don't have a full historic set of PPU data, so perhaps just "back a month" and "forward a month" buttons?

[HelenCEBM]

Slightly related to this when you go to the PPU page from a CCG dashboard (e.g. https://openprescribing.net/ccg/15N/price_per_unit/) there's no date on the URL. But there a link under the CCG's name at the top of the page: "We have identified about £429,546 of possible savings in NHS Devon CCG in May 2019" - which goes to exactly the same results but the url has the date added on. The presence of the link could be a bit confusing and we should consider removing if we implement a date option as above

[brianmackenna]

related to #1964