Trying to replicate OrderCalcMargin()

[rrsch]

I've looked for any documentation on what's under the hood of this function with no luck so far.

I'm trying to calculate required margin for upcoming positions, and OrderCalcMargin() gives me a different value than the standard calcuation that I'm digging up everwhere else on the web.

I'm currently trying to sort it out where

double m = OrderCalcMargin(ORDER_TYPE_BUY, _Symbol, 1.67, last_tick.ask, marginNeeded);

is returning a quite different value than

double leverage = (double)AccountInfoInteger(ACCOUNT_LEVERAGE);
double contractSize = SymbolInfoDouble(_Symbol, SYMBOL_TRADE_CONTRACT_SIZE);

double calcMargin = 1.67 * contractSize * last_tick.ask / leverage;

I want to plug this formula into a spreadsheet to figure out some numbers but I don't know which version to trust, and if version A happens to be correct I don't know what the underlying calculations are anyways.

Any help appreciated. Thanks!

[[Deleted]]

rrsch: I've looked for any documentation on what's under the hood of this function with no luck so far.

You will find it here ... https://www.mql5.com/en/docs/constants/environment_state/marketinfoconstants#enum_symbol_calc_mode

Both the OrderCalcMargin and OrderCalcProfit functions will calculate differently depending on the ENUM_SYMBOL_CALC_MODE

[rrsch]

Fernando Carreiro #:

You will find it here ... https://www.mql5.com/en/docs/constants/environment_state/marketinfoconstants#enum_symbol_calc_mode

Both the OrderCalcMargin and OrderCalcProfit functions will calculate differently depending on the ENUM_SYMBOL_CALC_MODE

Wonderful, thanks. I'll look into that.

[Dimitr Trifonov]

did anyone figure any calculation close/similar to OrderCalcMargin? 

I need to add this calculation to an indicator..

[Stanislav Korotky]

Dimitr Trifonov #:

did anyone figure any calculation close/similar to OrderCalcMargin? 

I need to add this calculation to an indicator..

Try this example from the algotrading book.