hana decision table (Percentage increase in data accrding to timestamp)

[former_member329515]

I have the following table on which I need to create a decision table.

Now my condition is as below if pressure increase by 50% over 5 days of time then the status should be critical.

so lets assume we run this rule on 6th sep 2016 then it should consider pressure of data available on sep2 2016 which is '3' and current data pressure sep6th 2016 that is '20'.

and the daviation is more than 50 % and hence status is critical.What should be the expression I should write to update the STATUS column accrding to above rule.