Point well taken Ironchef --- We all know it is just the opposite. The more Capital you are trading the more difficult it is to maintain your percentage gain.
It is just what I observe, in real trading, with my approach and strategy.
Of course, if you think it "should" not be so you are free to continue having your opinion. I am just reporting what for me is a fact (I repeat, for the specific approach I use, which relies on portfolio margin).
It really does not change anything for me if anyone has a different "opinion" of what, according to his abstract view, should happen.

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