Find the number of days taken to double the value

[sivakrishna]

Hi,

I have date and Income fields my requirement is when we take income of today how many days it was taken to  double the value, and display it in bar chart

[bhaskar_sm]

Hi,

can you please tell us, what is the basis of saying that the income is double? 

can you please share the sample data along with expected output?

 Thanks 

[sivakrishna]

Thanks for your reply 

Suppose corona cases in india incrementing daily,

Ex : if 56 day (today) cases are 50,000 then taken days to increment of cases from 25,000 to 50,000

My requirement is to find no of days for last  half incremented cases