Do I need and how to use DCA / StopLoss / trailing profit / filters?

Concerning the listed and many other tools, there is no such thing as necessary or not necessary. It depends on the individual preferences of the trader.

The same applies to the settings of these tools.

How to do this in Stratum-bot from a technical point of view is described on the relevant pages in the documentation.

There is no "correctness" in terms of efficiency/profitability.

There are no such "correct" numbers/values ​​that should always be used in the respective tools.

A trader either needs StopLoss or doesn't need it, or he thinks that -1% or -10% is acceptable for him. Everything is individual and depends on the trading strategy of the trader.