visualize data in chart for variable periods on user selection

[noviceneil]

I have a table with weekly data with weekly timestamp for more than a year. I want to show the data in a line chart but based on user selection for the duration like either last 1 month , 2 months or 4 months stored in a variable. how can it be done in ?
 INPUT :

PERIOD	SALES	CLOSED
20241002	1,010	179
20241009	902	211
20241016	690	219
20241023	690	219
20241030	690	219
20241106	805	227
20241113	823	225
20241120	853	223
20241127	857	223
20241204	902	211
20241211	956	191
20241218	984	181
20241225	994	181
20250101	1,010	179
20250108	1,030	181
20250115	1,055	183
20250122	1,077	193
20250129	1,139	191
20250205	1,147	191

vSelection = 1 or 2 or 4

Could you please help?

[SRA]

Hi, 

If we consider FDATE loaded with :

Date(Date#(PERIOD,'YYYYMMDD')) as FDATE

You could use a set analysis in you measure to filter on the period you want to display.

Here I consider that with vSelection = 2 you want to display the current month and the previous one : 

Sum({<FDATE={">=$(=MonthStart(Today(),-vSelection+1)) <=$(=Today())"}>} SALES)

Regards