Hi kujo.

The thing is simple. It's not a question of entry parameters not changing, it's just a question of not altering the entry logic and focusing on the exit.

If you execute the code provided in steps 5 and 8 of the article, the entry parameters do change, despite having changed only the exit logic and not the entry one.

Every time you alter the logic (in any sense), parameters will surely change. The point is just setting an initial logic, see performance and after that, test several exit criteria and compare results.