The fact is that i would like to have a method in order to standardize sl and tp for every assett on which i use an unique strategy.
The tradedvalue it would be different between two different assets (as well as sl% and tp%), and so i have to optimize values in order to achieve the same result (i.e. 20%)
For that i thought to a margin based solution (of course using the same margin amount for every assett)
At the end i decided to manually find a solution, supposing that i run a system on two different assets, i put at first the same position size:
Assett 1: 1.5 contracts= 1100$
Assett 2: 3.5 contracts= 1100$
Then simply
1
2
set target$profit220
set stop$loss110
Which is 20% and 10% of the margin.
Then i just have to manage the number of contracts in order to have it fixed around 1100€ considering price changes of the assetts through weeks and market movings.