How to configure custom alert

[someguy73]

I collect amount of prices every day and want to make custom alert, which will say to me that sum of prices changed more than 10%.
So I have fields PRC_TYP, "Reuters", BGN etc and SUMMA, where I calculate sum of current string

What should I write in filed Triggered Condition -> Custom -> "search ...." when cofigureted my alert?
How to connect field "SUMMA" with current date and a date before?
Please help 🙂

[richgalloway · Accepted solution]

Generally speaking, alerts are triggered from the content of the associated search. That is, if you didn't search for it, you can't alert on it.
You example search calculates a sum for the current time period. To test the 10% change, you have to perform the same calculation on the last time period's data (the timewrap app can help with that). Once you have both sums you can compute the difference and trigger an alert.