could you give me example to check free_margin for trading eurjpy ?

double openPrice = ...;
double lots = ...;
 
double leverage = AccountLeverage();   
double lotSize  = MarketInfo("EURJPY", MODE_LOTSIZE);
   
double requiredMargin = (lots * openPrice) * (lotSize / leverage);
   
if ( requiredMargin <= AccountFreeMargin() ) {
  Alert("Yes! I have margin to open an order");
}