Library for calculation of a margin required for opening a position in MetaТrader 5.

The library has 3 functions:

• Main function: GetMarginForOpening() - directly calculates a margin for opening 1.0 lot by a symbol;
• Auxiliary function: GetSymbolByCurrencies() - checks for a symbol in the market review;
• Auxiliary function: GetSymbolPrefix() - returns symbol prefix, if any.

The library is ready to be used. Functions can be copied directly to a code of an expert, an indicator, or a script and used in your code. It can be used just as a library.