Hi everyone,

there are some differences how a commission is calculated in different parts of the Zorro-manual.
First I thought only one can be right. But meanwhile I don't think either is.

1.) https://www.zorro-trader.com/manual/en/account.htm
Text:
"...percentage of the trade value...negative percent value... The commission is then automatically calculated from the percentage using the formula Commission = -Percent/100 * Price / LotAmount * PIPCost / PIP. "

Formula in text: Commission = -Percent/100 * Price (/ LotAmount * PIPCost / PIP)

In other ways: -Percent/100 * Price * (Exchange rate counter -> account-currency)
--> Aren't the Lots missing here?

2.) https://zorro-project.com/manual/en/spread.htm
Text:
"If a negative percent value is given (f.i. -0.25 for 0.25%), the commission of a trade is Percent/100 * PIPCost/PIP * Price * Lots * LotAmount."

Formula in text: Commission = Percent/100 * PIPCost/PIP * Price * Lots * LotAmount.

--> Should this be maybe: " / LotAmount" instead of " * LotAmount"?
or should PIP and LotAmount be in brackets?

3.) I think this one should be right: Percent/100 * PIPCost/PIP * Price * Lots / LotAmount.

This would be then: -Percent/100 * Price * Lots * PIPCost / PIP / LotAmount.
= -Percent/100 * (Tradevolume in counter currency) * (Exchange rate counter currency -> account-currency)

Can anybody confirm this?
And can this be fixed in the mentioned links please?

Last edited by Chiller; 10/02/21 16:58.