the default url type is: 
https://stooq.com/q/d/?s=^dax&c=0

it should be possible to change it in the settings of the indicator, to be able to use it with another url like: 

https://stooq.com/q/d/?s=%5Edax&c=0&i=w

so, if the indicator is used multiple times on the same platform with different url, the saved csv files must have different names in order to prevent overwritting of other csv files that contains different data (should already be the case, the website are saving in the files with different names).