Calculating amount of deal is crucial for trading. If it was too much you will lose all at once. The point is deciding amount of lost at first. After that you calculate the amount of the deal.
Optimal f is the technique of calculate amount of deal With mathematics. Optimal f is very aggressive technique for trade so you need simulate your deal before hand.
I pondered using this technique yesterday. But I decided not to use this technique because it's too aggressive so I would lose my money quickly once I would lose the deal. I like 2% rule, which regulates 2% of my money for a deal.
But I ordered the book of basic thought of this technique at BookDepository.