Margin Calculation Formula Forex Mode

[Dr Matthias Hammelsbeck]

Hi alltogether,

it is Corona time. So I have a lot of opportunity to develop new promising automatic trading strategies ...

In the middle of these activities I found a little discrepancy in the description of the margin calculation formula (forex mode) in the MQL5 documentation 

MQL5 Reference / Constants, Enumerations and Structures / Environment State / Symbol Properties

and in the website https://www.metatrader5.com/en/terminal/help/trading_advanced/margin_forex

In the MQL5 documentation you can read:

SYMBOL_CALC_MODE_FOREX

Forex mode - calculation of profit and margin for Forex

Margin:  Lots * Contract_Size / Leverage * Margin_Rate   Profit:   (close_price - open_price) * Contract_Size*Lots

But on the aforementioned website you will find:

What about the margin rate here???

Matthias