generally, my dear in forex trading, I really assume that we lose a lot of money because losses come from the greed and speed of entry and exit from trade transactions in foreign markets. That means we get a lesson from the damage how to avoid risks or losses during trading. and I don't think that it is necessary for a trader to calculate the loss, this is bad because it will make the trader more frustrated. The right thing for us to do is forget the old losses and then focus on better trade.